Medicare Enrolled
Dr. Jon Keller, MD
Pathology - Anatomic · Palo Alto, CA
Practice pattern: Mixed Practice
— Diverse clinical practice across multiple procedure types
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Keller from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Keller
Dr. Jon Keller is a pathology - anatomic specialist in Palo Alto, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Keller performed 586,649 Medicare services across 367,775 unique beneficiaries.
Between the years covered by Open Payments, Dr. Keller received a total of $17 from 1 pharmaceutical and/or device company across 1 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in pathology - anatomic. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Keller is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 19 years in practice
▲ Top 0% volume in CA
$17 industry payments
Medicare Practice Summary
Medicare Utilization ↗586,649
Medicare services
Top 0% in CA for pathology - anatomic
367,775
Unique beneficiaries
$11
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~30,876 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
108,357 | $8 | $14 |
| Complete blood count (CBC) with differential An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood, including a breakdown of the different types of white blood cells. |
52,060 | $8 | $49 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
50,809 | $10 | $66 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
32,471 | $13 | $84 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
26,648 | $10 | $61 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
23,732 | $16 | $106 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
21,485 | $8 | $54 |
| Urinalysis with microscopic exam A urine test performed manually that includes examining the sample under a microscope to check for abnormalities. |
12,227 | $3 | $20 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
11,911 | $5 | $33 |
| Urine culture, bacterial colony count A laboratory test that measures the number of bacteria growing in a urine sample to help identify infections. |
11,518 | $8 | $51 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
11,033 | $29 | $135 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
9,297 | $15 | $95 |
| Urine microalbumin test (kidney screening) A laboratory test that measures the amount of microalbumin, a small protein, in a urine sample. This test is used to detect early signs of kidney damage. |
8,379 | $6 | $38 |
| Complete blood count (CBC), automated An automated laboratory test that measures the levels of red blood cells, white blood cells, and platelets in the blood. |
8,374 | $6 | $34 |
| PSA test (prostate cancer screening) | 7,616 | $18 | $115 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
7,304 | $13 | $87 |
| C-reactive protein test (inflammation marker) A blood test that measures the level of C-reactive protein to detect the presence of infection or inflammation in the body. |
7,131 | $5 | $33 |
| Antibiotic sensitivity test A laboratory test that determines which antibiotics, antifungals, or antivirals are effective against a specific microorganism using microdilution or agar dilution methods. |
6,876 | $8 | $64 |
| Sed rate test (inflammation marker) This automated test measures how quickly red blood cells settle in a tube to detect inflammation in the body. |
6,489 | $3 | $18 |
| Iron level test | 6,109 | $6 | $41 |
| Iron binding capacity test A blood test that measures the amount of iron in the blood and the blood's ability to bind and transport iron. |
5,926 | $9 | $46 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
5,321 | $9 | $57 |
| Bacterial culture, aerobic A laboratory test that grows and identifies bacteria capable of surviving in oxygen. The results help determine the presence of specific aerobic microorganisms. |
5,266 | $8 | $52 |
| Liver function blood test panel | 4,569 | $8 | $52 |
| Automated urinalysis An automated laboratory test performed on a urine sample to analyze its chemical and physical properties. The procedure uses machinery to detect various substances and cells within the urine. |
4,514 | $2 | $17 |
| Uric acid level test A blood test that measures the level of uric acid in your body. Uric acid is a waste product formed when the body breaks down purines. |
4,457 | $4 | $29 |
| Prothrombin time test (blood clotting) A laboratory test that measures how long it takes for blood to clot. This procedure evaluates the body's coagulation process. |
4,256 | $4 | $25 |
| PSA test (prostate cancer screening) A blood test that measures the level of prostate-specific antigen to screen for prostate cancer. |
3,949 | $19 | $89 |
| Parathyroid hormone level test A blood test that measures the amount of parathyroid hormone in your body. This hormone helps regulate calcium levels in the blood and bones. |
3,918 | $40 | $260 |
| Blood creatinine level test A blood test that measures the amount of creatinine, a waste product from muscle wear and tear, to help assess kidney function. |
3,616 | $5 | $32 |
| Urine total protein level A laboratory test that measures the total amount of protein present in a urine sample. |
3,506 | $4 | $23 |
| Allergy blood test (IgE), per allergen A blood test that measures the level of immunoglobulin E (IgE) antibodies produced in response to a specific crude allergen extract. |
3,461 | $5 | $34 |
| Serum protein measurement A blood test that measures the total amount of protein in the serum. It helps evaluate overall health and nutritional status. |
3,232 | $11 | $68 |
| Phosphate level test A blood test that measures the amount of phosphate in your body. Phosphate is a mineral that helps keep bones and teeth strong. |
3,227 | $5 | $30 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
2,702 | $7 | $42 |
| Immunoglobulin level test A blood test that measures the level of gammaglobulins, which are immune system proteins. |
2,335 | $9 | $47 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
2,282 | $14 | $92 |
| Natriuretic peptide level test A blood test that measures the level of natriuretic peptide, a protein produced by the heart and blood vessels. |
2,179 | $38 | $217 |
| Bacterial culture, non-urine, non-blood, non-stool A laboratory test to identify bacteria from a sample other than urine, blood, or stool. The sample is grown in a lab to detect aerobic bacteria. |
2,036 | $8 | $54 |
| COVID-19 nucleic acid test, high throughput A laboratory test that detects the genetic material of the SARS-CoV-2 virus using an amplified probe technique. This method utilizes high-throughput technologies to process samples. |
1,996 | $74 | $106 |
| Immunoglobulin light chain measurement A blood test that measures the levels of immunoglobulin light chains, which are proteins produced by plasma cells. |
1,988 | $17 | $52 |
| COVID-19 nucleic acid test, high throughput A laboratory test that detects the genetic material of the SARS-CoV-2 virus using amplified probe techniques. This method utilizes high-throughput technologies to process samples efficiently. |
1,966 | $24 | $27 |
| Cardiac enzyme level (CK-MB) test A blood test that measures the total level of creatine kinase, specifically the cardiac enzyme fraction, to help evaluate heart muscle damage. |
1,909 | $6 | $41 |
| Kidney function blood test panel | 1,898 | $9 | $55 |
| Liver enzyme (SGPT) level test A blood test that measures the level of the liver enzyme SGPT to assess liver function. |
1,895 | $5 | $33 |
| Urine culture, bacterial identification A laboratory test that grows and identifies bacteria from a urine sample to detect infections. |
1,862 | $8 | $43 |
| Lactate dehydrogenase (LDH) level test A blood test that measures the amount of lactate dehydrogenase, an enzyme found in many body tissues. It helps assess tissue damage or disease. |
1,846 | $6 | $38 |
| Stool culture for additional pathogens A laboratory test that examines a stool sample to identify specific disease-causing organisms beyond standard screening. |
1,764 | $9 | $67 |
| Lipase level test A blood test that measures the amount of lipase, a fat-digesting enzyme, in your body. |
1,674 | $7 | $44 |
| Special stain for microorganism detection A laboratory test using a special stain to identify microorganisms in a sample. |
1,543 | $4 | $28 |
| Total cortisol level test A blood test that measures the total amount of cortisol hormone in your body. Cortisol is a hormone produced by the adrenal glands. |
1,419 | $16 | $102 |
| Serum immunofixation test A laboratory test that analyzes a blood serum sample to identify specific abnormal proteins. The procedure uses an immunologic technique to detect and characterize these proteins. |
1,390 | $22 | $142 |
| Fecal immunochemical test (FIT), 1-3 simultaneous A screening test that uses a stool sample to detect hidden blood in the feces, helping to identify potential colorectal cancer. |
1,389 | $18 | $82 |
| Troponin blood test A blood test that measures the amount of troponin protein in your body. Troponin is released into the blood when heart muscle is damaged. |
1,329 | $12 | $73 |
| Liver enzyme (SGOT) level test A blood test that measures the level of the liver enzyme SGOT to help assess liver health. |
1,234 | $5 | $33 |
| Autoimmune disorder screening test A laboratory test used to screen for the presence of autoimmune disorders. |
1,231 | $12 | $76 |
| Autoimmune disorder antibody test A laboratory test that measures antibodies in the blood to help assess for autoimmune disorders. |
1,177 | $17 | $119 |
| Manual white blood cell count A laboratory test that involves examining a sample under a microscope to manually count the number of white blood cells present. |
1,172 | $4 | $23 |
| Hemoglobin blood test A blood test that measures the amount of hemoglobin, the protein in red blood cells that carries oxygen. |
1,168 | $2 | $16 |
| Drug screening test A laboratory test that uses a chemistry analyzer to detect the presence of drugs in a sample. |
1,112 | $61 | $300 |
| Blood glucose level test A test that measures the amount of sugar in your blood. |
1,075 | $4 | $25 |
| Complement and antigen measurement A laboratory test to measure levels of complement proteins and antigens in the blood. |
1,075 | $12 | $76 |
| Automated red blood cell count An automated laboratory test that measures the number of red blood cells in a blood sample. |
1,046 | $4 | $28 |
| Total testosterone level test A blood test that measures the total amount of testosterone in your body. This hormone is important for various bodily functions in both men and women. |
1,013 | $25 | $161 |
| Gardnerella vaginalis detection test A laboratory test that uses a direct probe technique to detect the presence of Gardnerella vaginalis bacteria. |
1,000 | $20 | $71 |
| Candida yeast detection test A laboratory test that uses a direct probe technique to detect the presence of Candida species, a type of yeast, in a patient sample. |
997 | $20 | $79 |
| Trichomonas vaginalis nucleic acid test A laboratory test that uses a direct probe technique to detect the genetic material of the Trichomonas vaginalis parasite. |
997 | $20 | $68 |
| Direct bilirubin level test A blood test that measures the amount of direct bilirubin in your body. Direct bilirubin is the form of the waste product processed by the liver. |
989 | $5 | $22 |
| Tacrolimus level test A blood test to measure the amount of tacrolimus in your system. This helps ensure the medication is at a safe and effective level. |
974 | $13 | $97 |
| Ionized calcium level test A blood test that measures the amount of free, biologically active calcium in your body. This test helps evaluate calcium balance and related metabolic conditions. |
957 | $13 | $97 |
| Tuberculosis test, enumeration of t-cells A blood test that counts T-cells to help detect tuberculosis infection. |
953 | $98 | $478 |
| COVID-19 amplified DNA/RNA probe detection A laboratory test that uses amplified DNA or RNA probes to detect the presence of severe acute respiratory syndrome coronavirus 2 (COVID-19) antigen. |
905 | $50 | $73 |
| Blood potassium level test A blood test that measures the amount of potassium in your body. Potassium is an electrolyte that helps control heart and muscle function. |
904 | $5 | $30 |
| Stool culture A laboratory test that grows and identifies bacteria or other microorganisms from a stool sample to detect infections. |
882 | $9 | $62 |
| Rheumatoid factor level | 820 | $6 | $36 |
| Albumin level test A blood test that measures the amount of albumin, a protein made by the liver, in your body. |
797 | $5 | $18 |
| Alpha-fetoprotein (AFP) level test A blood test that measures the amount of alpha-fetoprotein in the serum. This test is used to monitor certain health conditions. |
792 | $16 | $108 |
| Stool test for hidden blood (FIT) A laboratory test that analyzes a stool sample to detect hidden blood using an immunoassay method. |
784 | $16 | $100 |
| Measurement of tissue transglutaminase | 767 | $11 | $36 |
| Carcinoembryonic antigen (CEA) level test A blood test that measures the level of carcinoembryonic antigen (CEA) protein. This test is used to monitor certain types of cancer. |
763 | $19 | $118 |
| Free T3 thyroid hormone test A blood test that measures the level of free triiodothyronine (T3) hormone in your body. This helps assess how well your thyroid gland is functioning. |
761 | $17 | $107 |
| Protein measurement in body fluid A laboratory test that measures the amount of protein present in a sample of body fluid. |
760 | $17 | $113 |
| Coagulation function measurement, d-dimer; quantitative | 739 | $10 | $73 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 125 | 706 | $20 | $132 |
| Free PSA test A blood test that measures the amount of unbound prostate-specific antigen in the blood. |
681 | $18 | $131 |
| Special fluorescent or acid-fast stain for microorganism A laboratory test that uses special fluorescent or acid-fast stains to identify microorganisms in a sample. |
675 | $5 | $36 |
| Urinalysis, microscopic examination A laboratory test that examines a urine sample under a microscope to check for cells, crystals, bacteria, or other substances. |
618 | $3 | $20 |
| Helicobacter pylori breath test A diagnostic test that analyzes a patient's breath to detect the presence of Helicobacter pylori bacteria. This procedure is used to identify infections associated with the stomach and upper digestive tract. |
617 | $66 | $363 |
| Helicobacter pylori drug administration This procedure involves the administration of a medication specifically used to treat Helicobacter pylori infection. |
615 | $8 | $47 |
| Gliadin (deamidated) antibody test A blood test that measures the level of deamidated gliadin peptide (DGP) antibodies. This test is used to help diagnose celiac disease. |
603 | $12 | $36 |
| Giardia detection test by immunoassay A laboratory test that uses immunoassay techniques to detect the presence of Giardia, an intestinal parasite, in a patient sample. |
592 | $12 | $66 |
| LDL cholesterol level test A blood test that measures the amount of low-density lipoprotein (LDL) cholesterol in your blood. LDL is often referred to as "bad" cholesterol. |
580 | $10 | $60 |
| Immunologic analysis for detection of tumor antigen, quantitative; ca 15-3 | 576 | $20 | $132 |
| Anaerobic bacterial culture A laboratory test that grows bacteria from a sample to identify anaerobic organisms. This test is performed on sources other than blood. |
549 | $9 | $69 |
| Clostridium difficile nucleic acid amplification test A laboratory test that uses nucleic acid amplification to detect the presence of Clostridium difficile bacteria. This method identifies the organism's genetic material to diagnose infection. |
547 | $37 | $154 |
| Specimen concentration for infectious agents A laboratory process that concentrates a specimen to detect infectious agents. |
506 | $7 | $52 |
| Total calcium level test A blood test that measures the total amount of calcium in your body. |
504 | $5 | $32 |
| Influenza virus detection test A laboratory test that uses an immunoassay technique to detect the presence of the influenza virus. |
490 | $14 | $64 |
| Bacterial blood culture A laboratory test that examines a blood sample to detect the presence of bacteria. The results help identify if a bacterial infection is present in the bloodstream. |
473 | $10 | $74 |
| Screening test for pathogenic organisms A laboratory test used to screen for the presence of disease-causing organisms in the body. |
469 | $6 | $41 |
| Hepatitis C antibody screening A blood test to check for antibodies indicating a Hepatitis C infection. This screening is performed for individuals at high risk or those with other covered indications. |
469 | $45 | $92 |
| Microsomal antibody test A blood test that measures the level of microsomal antibodies, which are autoantibodies produced by the immune system. |
468 | $14 | $92 |
| Rheumatoid arthritis antibody test A blood test to measure antibodies used in assessing rheumatoid arthritis. |
454 | $13 | $97 |
| Acid-fast bacilli culture A laboratory test that grows and identifies acid-fast bacteria, such as tuberculosis, from a patient sample. |
445 | $11 | $71 |
| Cryptosporidium detection test A laboratory test that uses an immunoassay technique to detect the presence of the Cryptosporidium parasite. |
442 | $14 | $66 |
| Glutamyltransferase (GGT) level test A blood test that measures the level of the liver enzyme glutamyltransferase (GGT) to help evaluate liver health. |
441 | $7 | $46 |
| Immunologic organism identification test A laboratory test that uses immunologic methods to identify specific organisms in a sample, excluding immunofluorescence techniques. |
437 | $5 | $33 |
| Hepatitis B virus DNA quantification test A laboratory test that measures the amount of hepatitis B virus DNA in the blood. This test helps determine the level of viral activity in the body. |
421 | $42 | $220 |
| Hepatitis B surface antigen test A blood test that uses an immunoassay technique to detect the presence of the hepatitis B surface antigen. This test identifies whether the hepatitis B virus is currently present in the body. |
417 | $10 | $65 |
| Blood sodium level test A laboratory test that measures the amount of sodium in your blood. Sodium is an electrolyte that helps regulate fluid balance and nerve function. |
400 | $5 | $30 |
| CA 19-9 tumor antigen test A blood test that measures the level of CA 19-9, a substance that can be found in the blood of some people with cancer. This quantitative analysis detects and measures the specific tumor antigen. |
395 | $20 | $133 |
| Amylase enzyme level test A blood test that measures the amount of amylase, an enzyme produced by the pancreas and salivary glands, to help evaluate pancreatic health. |
392 | $6 | $41 |
| Immunoassay detection test for other organisms A laboratory test using immunoassay techniques to detect specific organisms through direct visual observation. |
373 | $16 | $55 |
| Coagulation assessment blood test A blood test that measures how long it takes for blood to clot. The sample can be plasma or whole blood. |
372 | $6 | $40 |
| Clostridium difficile toxin test A stool test that uses an immunoassay technique to detect toxins produced by the Clostridium difficile bacteria. |
358 | $12 | $68 |
| Beta-2 microglobulin level test A blood test that measures the level of beta-2 microglobulin, a protein produced by cells in the body. |
340 | $16 | $117 |
| Beta 2 glycoprotein 1 antibody (autoantibody) measurement | 335 | $25 | $94 |
| Urine sodium level test A laboratory test that measures the amount of sodium in a urine sample. This test helps evaluate electrolyte balance and kidney function. |
333 | $5 | $32 |
| Haptoglobin level test A blood test that measures the amount of haptoglobin, a protein in the serum. It helps evaluate red blood cell breakdown. |
328 | $12 | $90 |
| Total T3 thyroid hormone test A blood test that measures the total amount of triiodothyronine (T3) hormone in your body. T3 is a thyroid hormone that helps regulate metabolism and energy levels. |
325 | $14 | $90 |
| Antimicrobial drug evaluation Assessment of the patient's response to antibiotic, antifungal, or antiviral therapy. |
324 | $7 | $39 |
| High-sensitivity C-reactive protein test A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation. |
315 | $13 | $84 |
| Digoxin level test A blood test that measures the total amount of digoxin in your system. This helps healthcare providers check if the medication level is within a safe and effective range. |
309 | $13 | $85 |
| Urine osmolality test This test measures the concentration of particles in your urine to help evaluate your body's fluid balance and kidney function. |
303 | $7 | $49 |
| Urine calcium level test A laboratory test that measures the amount of calcium present in a urine sample. This test helps evaluate calcium metabolism and kidney function. |
299 | $6 | $33 |
| Nucleic acid test for organism quantification A laboratory test that uses nucleic acid detection to measure the amount of a specific organism present in a sample. |
292 | $42 | $164 |
| Thyroglobulin antibody blood test A blood test that measures the level of antibodies against thyroglobulin, a protein produced by the thyroid gland. |
288 | $16 | $100 |
| Blood osmolality measurement A laboratory test that measures the concentration of particles dissolved in the blood. This test helps evaluate the balance of water and salts in the body. |
268 | $6 | $46 |
| Screening test for antibody to noninfectious agent A laboratory test that screens for the presence of antibodies produced in response to a noninfectious agent. |
266 | $12 | $121 |
| Hepatitis B surface antibody test A blood test that measures the level of antibodies against the hepatitis B surface antigen. This test is used to check for immunity to hepatitis B or to verify the effectiveness of the hepatitis B vaccine. |
261 | $10 | $68 |
| Hepatitis B core antibody test A blood test that measures the level of antibodies to the hepatitis B core antigen. This test helps determine if a person has been infected with the hepatitis B virus. |
250 | $12 | $84 |
| Immunologic analysis of body fluid with concentration A laboratory test that uses immunologic techniques to analyze a body fluid sample after it has been concentrated. |
242 | $29 | $187 |
| Total estradiol level test A blood test that measures the total amount of estradiol, a form of estrogen, in the body. |
240 | $27 | $171 |
| Insulin level test A blood test that measures the total amount of insulin in your body. |
238 | $11 | $74 |
| Syphilis detection test A laboratory test used to detect the presence of syphilis infection in the body. |
238 | $4 | $27 |
| Prolactin level test A blood test that measures the amount of prolactin, a hormone produced by the pituitary gland that stimulates milk production, in the body. |
231 | $19 | $122 |
| IgE level test A blood test that measures the level of immunoglobulin E (IgE) proteins in the immune system. |
230 | $16 | $107 |
| Homocysteine level test A blood test that measures the amount of homocysteine, an amino acid, in the body. |
228 | $18 | $122 |
| Immunoassay substance analysis, multiple step method A laboratory test that uses an immunoassay technique to analyze a substance. The process involves multiple steps to detect or measure the target material. |
224 | $11 | $76 |
| HPV high-risk type nucleic acid test A laboratory test that uses nucleic acid detection to identify high-risk types of human papillomavirus. |
223 | $34 | $198 |
| Thyroglobulin level test A blood test that measures the level of thyroglobulin, a protein produced by the thyroid gland. |
219 | $16 | $102 |
| DNA antibody test (native or double-stranded) A blood test that measures the level of antibodies targeting native or double-stranded DNA. This test is used to detect the presence of these specific antibodies in the body. |
219 | $13 | $97 |
| Stool test for H. pylori bacteria A stool sample is analyzed using an immunoassay technique to detect the presence of Helicobacter pylori bacteria in the gastrointestinal tract. |
213 | $14 | $106 |
| Autoimmune disorder antibody titer test A blood test that measures the level of specific antibodies to help assess autoimmune disorders. |
207 | $11 | $78 |
| Fungal culture test A laboratory test that grows and identifies mold or yeast from a sample to detect a fungal infection. |
207 | $8 | $61 |
| Chlamydia trachomatis nucleic acid amplification test A laboratory test that uses nucleic acid amplification to detect the presence of Chlamydia trachomatis bacteria in a sample. |
197 | $34 | $211 |
| Hepatitis A antibody test A blood test that measures the level of antibodies to the hepatitis A virus in your body. This test helps determine if you have been exposed to the virus or if you have immunity from vaccination. |
188 | $12 | $77 |
| Multiplex respiratory virus test (COVID-19, flu, RSV) A laboratory test that uses a multiplex amplified probe technique to detect severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), influenza virus types A and B, and respiratory syncytial virus (RSV). |
183 | $139 | $204 |
| Infectious disease DNA/RNA test A laboratory test that uses a specific technique to detect the genetic material of an organism. This method amplifies the target DNA or RNA to identify the presence of the organism. |
182 | $34 | $169 |
| Body fluid cell count with identification A laboratory test that counts the number of cells in a body fluid sample and identifies the specific types of cells present. |
172 | $5 | $41 |
| Follicle stimulating hormone (FSH) level A blood test to measure the level of follicle stimulating hormone, a reproductive hormone. |
169 | $18 | $115 |
| Herpes simplex virus nucleic acid test A laboratory test that uses an amplified probe technique to detect the genetic material of the herpes simplex virus. |
167 | $34 | $193 |
| DHEA-S hormone level test A blood test that measures the level of dehydroepiandrosterone sulfate (DHEA-S), a hormone produced by the adrenal glands. |
166 | $22 | $143 |
| Luteinizing hormone level test A blood test that measures the level of luteinizing hormone, a reproductive hormone. This test helps evaluate hormonal balance and reproductive function. |
158 | $18 | $114 |
| Sex hormone binding globulin level test A blood test that measures the level of sex hormone binding globulin, a protein that binds to sex hormones in the bloodstream. |
155 | $21 | $157 |
| Hepatitis C antibody test A blood test that checks for antibodies to the hepatitis C virus. This test helps determine if a person has been exposed to the virus. |
155 | $14 | $90 |
| C-peptide level test A blood test that measures the amount of C-peptide, a protein produced along with insulin, to help evaluate insulin production and diabetes management. |
145 | $20 | $133 |
| 1,25-dihydroxyvitamin D level test A blood test that measures the level of active vitamin D in the body. |
143 | $38 | $212 |
| Lipoprotein (a) level | 143 | $14 | $84 |
| Cardiolipin antibody (tissue antibody) measurement | 143 | $25 | $174 |
| Nucleic acid test for multiple organisms A laboratory test that uses amplified probe techniques to detect the genetic material of multiple organisms in a sample. |
140 | $69 | $554 |
| Fungal culture of skin, hair, or nail A laboratory test that grows and identifies fungal organisms, such as mold or yeast, from a sample of skin, hair, or nail. |
135 | $8 | $49 |
| Alkaline phosphatase level test A blood test that measures the level of alkaline phosphatase, an enzyme found in the liver and bones. |
134 | $5 | $33 |
| Blood urea nitrogen test A blood test that measures the amount of urea nitrogen to assess kidney function. |
134 | $4 | $25 |
| Influenza virus nucleic acid detection test A laboratory test that uses nucleic acid technology to detect multiple types of influenza virus. |
133 | $94 | $392 |
| Respiratory syncytial virus (RSV) nucleic acid test A laboratory test that uses nucleic acid amplification to detect the presence of respiratory syncytial virus in a sample. |
132 | $69 | $429 |
| Crystal identification from tissue or body fluid Laboratory analysis to identify crystals found in tissue samples or body fluids. |
131 | $7 | $52 |
| Gonorrhea nucleic acid amplification test A laboratory test that uses amplified probe techniques to detect the genetic material of gonorrhea bacteria. This method identifies the presence of the infection by analyzing nucleic acids from the sample. |
126 | $34 | $211 |
| Immunoassay substance measurement A laboratory test that uses immunoassay techniques to measure the level of a specific substance in a sample. |
121 | $14 | $59 |
| Antimicrobial drug detection test A laboratory test used to identify the presence of antibiotics, antifungals, or antivirals in a sample. |
117 | $5 | $13 |
| Yeast culture test A laboratory test that grows and identifies yeast from a sample to determine the specific type present. |
110 | $10 | $71 |
| Measles antibody test A blood test that measures antibodies to the measles virus to check for immunity or infection. |
109 | $13 | $91 |
| HIV-1 antigen and HIV-1/2 antibody test A laboratory test using immunoassay techniques to detect HIV-1 antigens and antibodies for both HIV-1 and HIV-2. |
106 | $24 | $90 |
| Epstein-Barr virus antibody test A blood test that measures antibodies to the Epstein-Barr virus, also known as the mononucleosis virus. |
105 | $17 | $120 |
| Hepatitis C virus RNA quantification test A blood test that measures the amount of hepatitis C virus genetic material in the body. This test helps determine the level of viral infection. |
105 | $42 | $276 |
| Fungal culture, yeast A laboratory test that grows and identifies yeast or fungal organisms from a sample to determine if an infection is present. |
103 | $10 | $71 |
| Ceruloplasmin (protein) level | 102 | $11 | $78 |
| Valproic acid level test A blood test that measures the total amount of valproic acid in your system. This helps healthcare providers monitor medication levels to ensure they are within a safe and effective range. |
101 | $13 | $99 |
| Bacterial culture for anaerobic isolates | 100 | $8 | $52 |
| Hepatitis A antibody (IgM) test A blood test that measures the level of IgM antibodies to determine if you have a recent or acute Hepatitis A infection. |
97 | $11 | $79 |
| HIV-1 viral load test A blood test that measures the amount of HIV-1 virus in your body using nucleic acid detection. |
97 | $83 | $557 |
| Apolipoprotein level test A blood test that measures the amount of apolipoproteins, which are proteins that bind to lipids to form lipoproteins. This test helps evaluate the levels of specific proteins involved in fat transport in the blood. |
95 | $21 | $90 |
| Somatomedin (growth factor) level test A blood test to measure the level of somatomedin, also known as a growth factor, in the body. |
95 | $21 | $137 |
| CMV DNA quantification test A laboratory test that measures the amount of cytomegalovirus (CMV) DNA in a sample to determine the level of infection. |
93 | $42 | $149 |
| Mumps virus antibody test A blood test that measures the level of antibodies to the mumps virus in your body. This test helps determine if you have been exposed to the virus or if you have immunity. |
87 | $13 | $91 |
| Rubella antibody test A blood test that measures the level of antibodies to the rubella virus. This test checks for immunity to German measles or identifies a current infection. |
87 | $14 | $100 |
| Genetic analysis of organisms using direct probe A laboratory test that uses genetic probes to identify specific organisms. This method analyzes genetic material to detect the presence of particular pathogens. |
87 | $20 | $111 |
| Blood type test (ABO) A laboratory test that determines your ABO blood type by identifying specific antigens on the surface of your red blood cells. |
85 | $3 | $18 |
| Rh (D) antigen blood typing A laboratory test that identifies whether your blood has the Rh (D) antigen. This determines if your blood type is Rh-positive or Rh-negative. |
85 | $3 | $18 |
| Cyclosporine level test A blood test to measure the amount of cyclosporine in your system. This helps healthcare providers monitor your medication levels. |
81 | $18 | $137 |
| Procalcitonin (hormone) level | 81 | $27 | $174 |
| Antimicrobial susceptibility test, macrobroth dilution A laboratory test that determines which antibiotics, antifungals, or antivirals are effective against a specific microorganism using the macrobroth dilution method. |
80 | $7 | $33 |
| Lactic acid level | 78 | $11 | $76 |
| Shiga-like toxin detection test A laboratory test that uses an immunoassay technique to detect the presence of shiga-like toxin, a bacterial toxin, in a sample. |
76 | $12 | $71 |
| Direct red blood cell antibody test A blood test that checks for antibodies attached directly to the surface of red blood cells. This procedure helps identify immune-mediated destruction of red blood cells. |
73 | $5 | $43 |
| Total bilirubin level test A blood test that measures the total amount of bilirubin, a waste product from the breakdown of red blood cells, in your body. |
72 | $5 | $33 |
| Progesterone level test A blood test that measures the amount of progesterone, a reproductive hormone, in your body. |
69 | $20 | $149 |
| Transferrin level test A blood test that measures the amount of transferrin, a protein that binds to and transports iron in the body. |
69 | $12 | $91 |
| Ammonia level test A blood test that measures the amount of ammonia in your body. Ammonia is a waste product that the liver normally converts into urea for removal. |
63 | $14 | $103 |
| Red blood cell concentration measurement A laboratory test that measures the concentration of red blood cells in the blood. |
62 | $2 | $14 |
| Acute hepatitis panel A blood test that screens for markers of acute viral hepatitis infection. |
60 | $47 | $300 |
| Fibrinogen activity test A blood test that measures the activity level of fibrinogen, a protein essential for blood clotting. |
60 | $9 | $61 |
| Screening test for red blood cell antibodies | 60 | $10 | $61 |
| Epstein-Barr virus antibody test, early antigen A blood test that measures antibodies to the early antigen of the Epstein-Barr virus. This analysis helps determine if a person has been exposed to the virus. |
59 | $13 | $88 |
| Epstein-Barr virus antibody test A blood test that checks for antibodies to the Epstein-Barr virus, which causes infectious mononucleosis. |
58 | $15 | $102 |
| Phenytoin level test A blood test to measure the total amount of phenytoin in your system. This helps healthcare providers monitor medication levels and adjust dosing. |
54 | $13 | $95 |
| Prealbumin (protein) level | 54 | $14 | $106 |
| Cytomegalovirus (CMV) antibody test A blood test that measures antibodies to the cytomegalovirus (CMV) to determine if you have been exposed to the infection. |
53 | $14 | $55 |
| Respiratory virus nucleic acid test, 3-5 targets A laboratory test that uses nucleic acid detection to identify multiple types or subtypes of respiratory viruses. The test analyzes 3 to 5 specific viral targets. |
52 | $137 | $609 |
| Varicella-zoster virus antibody test A blood test that measures antibodies to the varicella-zoster virus, which causes chickenpox and shingles. It determines if a person has immunity to the virus. |
49 | $13 | $84 |
| TB DNA amplification test A laboratory test that uses DNA amplification to detect the presence of tuberculosis bacteria in a sample. |
48 | $41 | $131 |
| Protein S clotting inhibitor test A blood test that measures the level of Protein S, a natural inhibitor that helps prevent excessive blood clotting. |
47 | $15 | $109 |
| Alpha-1-antitrypsin blood test A blood test that measures the total level of alpha-1-antitrypsin protein in the body. |
46 | $13 | $97 |
| Protein C antigen test A blood test that measures the level of Protein C antigen, a natural inhibitor involved in blood clotting. |
46 | $14 | $97 |
| Mycobacteria identification test A laboratory test used to identify mycobacteria, including tuberculosis or similar organisms. |
46 | $14 | $77 |
| Lithium level test A blood test to measure the amount of lithium in your body. This helps ensure the medication is at a safe and effective level. |
45 | $6 | $47 |
| HDL cholesterol level test A blood test that measures the amount of high-density lipoprotein (HDL) cholesterol in your blood. HDL is often referred to as 'good' cholesterol. |
43 | $8 | $37 |
| Automated platelet count test A laboratory test that uses a machine to count the number of platelets in a blood sample. Platelets are blood cells that help the body form clots to stop bleeding. |
43 | $4 | $28 |
| Antithrombin III antigen activity test A blood test that measures the level of antithrombin III, a protein that helps regulate blood clotting. |
41 | $12 | $82 |
| Thyroxine (T4) level test A blood test that measures the total amount of thyroxine, a thyroid hormone, in your body. |
40 | $7 | $44 |
| CMV IgM antibody test A blood test that measures IgM antibodies to detect a recent or active cytomegalovirus (CMV) infection. |
40 | $16 | $63 |
| Hepatitis B core antibody (IgM) test A blood test that measures the level of IgM antibodies to the hepatitis B core antigen. This test is used to help determine if a person has a recent or acute hepatitis B infection. |
38 | $11 | $87 |
| Electrolyte blood test panel A blood test that measures the levels of sodium, potassium, chloride, and carbon dioxide to evaluate electrolyte balance. |
37 | $7 | $48 |
| Cryoglobulin protein measurement A blood test to measure the level of cryoglobulin proteins. These are abnormal proteins that can clump together in cold temperatures. |
37 | $6 | $41 |
| Syphilis antibody test A blood test that checks for antibodies to the bacteria that causes syphilis. |
37 | $13 | $92 |
| Total protein level test, body fluid A laboratory test that measures the total amount of protein in a sample of body fluid. This helps evaluate the composition of fluids such as cerebrospinal fluid, pleural fluid, or ascites. |
36 | $4 | $29 |
| Mononucleosis screening test A laboratory test used to screen for the presence of mononucleosis. It detects markers associated with the infection. |
36 | $5 | $33 |
| Herpes simplex virus type 2 antibody test A blood test that checks for antibodies to the herpes simplex virus type 2. This test helps determine if a person has been exposed to the virus. |
36 | $18 | $69 |
| Herpes simplex virus type 1 antibody test A blood test that checks for antibodies to the herpes simplex virus type 1. This test determines if the body has been exposed to the virus. |
35 | $12 | $47 |
| Sirolimus level test A blood test to measure the amount of sirolimus in your body. This helps your doctor check if the medicine level is within the safe and effective range. |
32 | $13 | $101 |
| Triglyceride level test A blood test that measures the amount of triglycerides, a type of fat, in your blood. |
32 | $6 | $37 |
| HIV screening test (antigen/antibody) A blood test used to screen for HIV infection by detecting both HIV antigens and antibodies. It is a standard initial test to determine if a person has been exposed to the virus. |
32 | $24 | $117 |
| Glucose level test on body fluid A laboratory test that measures the amount of glucose (sugar) present in a sample of body fluid. |
31 | $4 | $27 |
| Cholesterol level test A blood test that measures the amount of cholesterol in your body. |
30 | $4 | $28 |
| Clotting factor VIII measurement A blood test that measures the level of factor VIII, a protein essential for blood clotting. |
30 | $18 | $121 |
| Total protein blood test A blood test that measures the total amount of protein in your blood. This test helps evaluate your overall health and nutritional status. |
28 | $4 | $15 |
| Tissue preparation for culture The process of preparing a tissue sample for laboratory culture. This procedure involves handling the specimen to facilitate the growth and identification of microorganisms. |
28 | $6 | $42 |
| Urine pregnancy test A laboratory test performed on a urine sample to detect the presence of human chorionic gonadotropin (hCG), a hormone produced during pregnancy. |
27 | $8 | $16 |
| Creatinine clearance test A test that measures how well the kidneys are filtering waste from the blood. It helps assess overall kidney function. |
22 | $9 | $60 |
| Gonadotropin, chorionic (reproductive hormone) level | 21 | $15 | $98 |
| Multiplex PCR test for SARS-CoV-2 and influenza A and B A laboratory test that uses a multiplex amplified probe technique to detect the presence of SARS-CoV-2 (COVID-19) and influenza virus types A and B in a single sample. |
21 | $140 | $198 |
| Urine potassium level test A laboratory test that measures the amount of potassium in a urine sample. This test helps evaluate kidney function and electrolyte balance. |
20 | $5 | $26 |
| Syphilis test A blood test used to detect antibodies or antigens associated with syphilis infection. |
19 | $4 | $31 |
| COVID-19 antibody test A blood test that measures antibodies to severe acute respiratory syndrome coronavirus 2 (COVID-19). It detects the presence of immune response markers to the virus. |
19 | $41 | $69 |
| Automated white blood cell count A laboratory test that uses a machine to count the number of white blood cells in a blood sample. |
18 | $2 | $16 |
| Human growth hormone level test A blood test to measure the amount of human growth hormone in the body. |
16 | $16 | $120 |
| Radioimmunoassay test A laboratory test that uses radioimmunoassay techniques to measure the level of a specific substance in the body. |
16 | $18 | $103 |
| Stool lactoferrin test A laboratory test that analyzes a stool sample to detect lactoferrin, a protein produced by the immune system. This test is used to identify the presence of inflammation in the intestines. |
16 | $19 | $153 |
| HPV high-risk type test for cervical cancer screening This test detects high-risk types of human papillomavirus (HPV) DNA or RNA. It is used for cervical cancer screening and must be performed in addition to a Pap test. |
15 | $34 | $236 |
| Immunologic analysis for antigen or antibody detection A laboratory test that analyzes a sample to detect the presence of specific antigens or antibodies. This analysis helps identify immune system responses to various substances or infections. |
14 | $12 | $45 |
| Phenobarbital level test A blood test to measure the amount of phenobarbital in your system. This helps healthcare providers monitor medication levels and ensure safe and effective treatment. |
12 | $15 | $82 |
| Stool test for blood to screen for colon tumors A test that analyzes a stool sample to detect hidden blood, which is used to screen for colon tumors. |
11 | $4 | $21 |
| Flow cytometry DNA or cell analysis, first marker A laboratory test that uses a laser to analyze cells or DNA by detecting a specific marker on the cell surface or within the cell. |
11 | $75 | $126 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
Industry Payment Transparency
Open Payments through 2019 ↗$17
Total received (2019-2019)
Bottom 7% in CA for pathology - anatomic
1
Company
1
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$17 (100.0%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2019
$17
Payments by company (2019)
Consulting
Speaking
Meals & Travel
Research
Siemens Medical Solutions USA, Inc.
$17
Top 3 companies account for 100.0% of 2019 payments
Associated products mentioned in payments ›
Atellica
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Pathology - anatomics within 10 mi
108
Per 100K population
5.7
County median income
$159,674
Nearest hospital
STANFORD HEALTH CARE
2.1 mi
2.1 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2019 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Keller is a mixed practice specialist, with above-average Medicare volume (top 0% in CA), with low-engagement industry engagement, with 19 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Keller experienced with blood draw (venipuncture)?
Based on Medicare claims data, Dr. Keller performed 108,357 blood draw (venipuncture) services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Keller receive payments from pharmaceutical companies?
Yes. Dr. Keller received a total of $17 from 1 company across 1 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Keller's costs compare to other pathology - anatomics in Palo Alto?
Dr. Keller's average Medicare payment per service is $11. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Keller) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
Provider corrections: Provider portal · Privacy questions: Privacy Policy · Terms: Terms of Use · Methodology: Methodology