Medicare Enrolled
Dr. Michael Marsh, M.D.
Internal Medicine · Toluca Lake, 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. Marsh 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 →
Are you Dr. Marsh?
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What this data tells you about Dr. Marsh
Dr. Michael Marsh is an internal medicine specialist in Toluca Lake, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Marsh performed 29,787 Medicare services across 9,571 unique beneficiaries.
Between the years covered by Open Payments, Dr. Marsh received a total of $8,900 from 67 pharmaceutical and/or device companies across 346 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in internal medicine. 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. Marsh 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 1% volume in CA
$8,900 industry payments
Medicare Practice Summary
Medicare Utilization ↗29,787
Medicare services
Top 1% in CA for internal medicine
9,571
Unique beneficiaries
$17
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~1,568 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 |
|---|---|---|---|
| Allergy skin test A diagnostic test performed to identify specific allergies by applying or introducing allergenic extracts to the body. The procedure measures the patient's immune response to various potential allergens. |
8,720 | $4 | $10 |
| Allergy immunotherapy preparation A professional service involving the preparation and administration of one or more antigens. |
4,600 | $14 | $20 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
1,668 | $64 | $95 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,020 | $8 | $15 |
| 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. |
932 | $8 | $25 |
| 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. |
887 | $17 | $48 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
851 | $8 | $45 |
| Liver function blood test panel | 843 | $8 | $23 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
832 | $16 | $48 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
824 | $9 | $26 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
823 | $10 | $45 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
784 | $29 | $85 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
782 | $13 | $38 |
| PSA test (prostate cancer screening) | 367 | $18 | $60 |
| Manual urinalysis with microscopic examination A urine test performed manually without automated equipment. The sample is examined under a microscope to check for abnormalities. |
354 | $4 | $9 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
308 | $86 | $130 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
307 | $14 | $42 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
298 | $15 | $43 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
266 | $13 | $40 |
| Iron level test | 266 | $6 | $19 |
| Transferrin level test A blood test that measures the amount of transferrin, a protein that binds to and transports iron in the body. |
266 | $12 | $40 |
| 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. |
229 | $74 | $100 |
| 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. |
229 | $24 | $25 |
| Remote vital sign monitoring management, each additional 20 minutes This code covers the time spent by a provider managing patient data from remote vital sign monitoring devices. It applies to each additional 20-minute increment beyond the initial monthly service period. |
221 | $32 | $75 |
| Nasal endoscopy A diagnostic procedure that uses a thin, lighted tube to examine the inside of the nasal passages. |
209 | $164 | $325 |
| Electrocardiogram (EKG), 12-lead A standard heart rhythm test using at least 12 leads to record electrical activity. A healthcare provider interprets the results and provides a written report. |
181 | $11 | $80 |
| Remote patient monitoring management, 20 min/month Management based on results from remote vital sign monitoring for the first 20 minutes per calendar month. |
130 | $39 | $75 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
116 | $144 | $200 |
| Chest X-ray, 1 view An X-ray image of the chest taken from a single angle. This imaging test is used to visualize the structures within the chest cavity. |
115 | $21 | $90 |
| 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. |
112 | $6 | $16 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
110 | $5 | $15 |
| Remote patient monitoring device, 30 days Initial setup of devices for remote monitoring of body functions with daily data transmission or alerts. This service covers the first 30 days of the monitoring period. |
105 | $42 | $130 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
95 | $140 | $250 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
94 | $10 | $51 |
| Erythrocyte sedimentation rate (ESR) test A blood test that measures how quickly red blood cells settle in a test tube to detect inflammation in the body. This specific method is performed manually rather than using an automated machine. |
83 | $4 | $22 |
| 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. |
82 | $21 | $43 |
| High-sensitivity C-reactive protein test A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation. |
72 | $13 | $37 |
| Homocysteine level test A blood test that measures the amount of homocysteine, an amino acid, in the body. |
70 | $18 | $48 |
| 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. |
70 | $4 | $13 |
| Chest X-ray, 2 views An X-ray imaging test of the chest that captures two different angles to visualize the lungs, heart, and chest wall. |
65 | $27 | $110 |
| Nursing facility visit, low complexity A daily follow-up visit for an existing patient in a nursing facility involving straightforward medical decision making. The visit requires at least 15 minutes of time if time is used to determine the level of care. |
65 | $63 | $175 |
| Rheumatoid factor analysis | 64 | $6 | $17 |
| X-ray of lower and sacral spine, 2-3 views An X-ray imaging test that captures 2 to 3 views of the lower back and sacral spine to visualize the bones and joints in this area. |
61 | $34 | $110 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
58 | $1 | $40 |
| Drug injection, under skin or into muscle A procedure involving the administration of a medication or substance via injection into the subcutaneous tissue or muscle. |
57 | $11 | $30 |
| 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. |
54 | $41 | $60 |
| 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. |
51 | $4 | $10 |
| 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. |
50 | $25 | $73 |
| Cardiac creatine kinase MB level test A blood test that measures the level of the MB fraction of creatine kinase, an enzyme found in heart muscle. This test helps assess potential heart muscle damage. |
48 | $11 | $12 |
| 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. |
48 | $12 | $13 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
44 | $29 | $30 |
| 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. |
41 | $50 | $75 |
| Lipoprotein (a) level | 40 | $14 | $20 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
35 | $7 | $20 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
34 | $1 | $25 |
| Flu vaccine, quadrivalent A flu shot containing four strains of the influenza virus to help prevent seasonal influenza infection. |
33 | $76 | $80 |
| X-ray of upper spine, 4-5 views An X-ray imaging test of the upper spine using 4 to 5 different views to visualize the bones and structures in that area. |
30 | $47 | $115 |
| Knee X-ray, 1-2 views An X-ray imaging test of the knee joint using one to two different angles to visualize the bones and surrounding structures. |
29 | $30 | $100 |
| 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. |
28 | $5 | $15 |
| Insulin level test A blood test that measures the total amount of insulin in your body. |
27 | $11 | $45 |
| Advance care planning consultation, first 30 min A session focused on discussing and documenting future healthcare preferences and goals. This service covers the initial 30 minutes of the planning discussion. |
27 | $35 | $100 |
| Total estradiol level test A blood test that measures the total amount of estradiol, a form of estrogen, in the body. |
26 | $27 | $79 |
| Ear wax removal A procedure to remove impacted ear wax from the ear canal. |
25 | $34 | $70 |
| 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. |
25 | $6 | $32 |
| Glutamyltransferase (GGT) level test A blood test that measures the level of the liver enzyme glutamyltransferase (GGT) to help evaluate liver health. |
24 | $7 | $21 |
| 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. |
21 | $21 | $35 |
| 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. |
20 | $6 | $8 |
| New patient office visit, complex (60-74 min) | 20 | $167 | $225 |
| Paranasal sinus X-ray, minimum 3 views An X-ray imaging test of the paranasal sinuses using at least three different views to visualize the sinus cavities. |
18 | $29 | $140 |
| X-ray of both hips, 2 views An X-ray imaging test that captures two views of both hip joints to evaluate bone structure and alignment. |
18 | $36 | $110 |
| Progesterone level test A blood test that measures the amount of progesterone, a reproductive hormone, in your body. |
18 | $20 | $59 |
| 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. |
18 | $19 | $55 |
| Hip X-ray, 2-3 views An X-ray imaging test of the hip joint using two to three different angles to visualize the bones and surrounding structures. |
17 | $36 | $110 |
| 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. |
17 | $6 | $33 |
| Lipase level test A blood test that measures the amount of lipase, a fat-digesting enzyme, in your body. |
17 | $7 | $20 |
| Injection, methylprednisolone acetate, 40 mg | 17 | $6 | $60 |
| Shoulder X-ray, 2+ views An X-ray imaging test of the shoulder joint using at least two different angles to visualize the bones and surrounding structures. |
16 | $30 | $110 |
| 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. |
16 | $16 | $33 |
| 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). |
16 | $140 | $225 |
| Follicle stimulating hormone (FSH) level A blood test to measure the level of follicle stimulating hormone, a reproductive hormone. |
15 | $18 | $53 |
| 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. |
15 | $18 | $53 |
| 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. |
14 | $19 | $20 |
| Foot X-ray, 3+ views An X-ray imaging test of the foot that captures at least three different views to evaluate the bones and joints. |
13 | $27 | $100 |
| Destruction of precancerous skin growth, 1 Removal of a single precancerous skin growth. This procedure destroys abnormal skin cells to prevent them from developing into cancer. |
12 | $48 | $200 |
| Ankle X-ray, minimum 3 views An X-ray imaging test of the ankle that captures at least three different angles to evaluate the bones and joints. |
12 | $31 | $100 |
| Complete ultrasound of abdomen A diagnostic imaging test that uses sound waves to create detailed pictures of the organs and structures within the abdomen. |
12 | $98 | $170 |
| Microsomal antibody test A blood test that measures the level of microsomal antibodies, which are autoantibodies produced by the immune system. |
12 | $14 | $40 |
| Quadrivalent influenza vaccine, cell culture-derived A flu shot that protects against four strains of the influenza virus. It is produced using cell culture technology rather than traditional egg-based methods. |
12 | $32 | $35 |
| Thyroglobulin antibody blood test A blood test that measures the level of antibodies against thyroglobulin, a protein produced by the thyroid gland. |
11 | $16 | $44 |
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 2024 ↗$8,900
Total received (2018-2024)
Avg $1,271/year across 7 years
Top 11% in CA for internal medicine
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
67
Companies
346
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
$8,790 (98.8%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$111 (1.2%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$2,070
2023
$1,599
2022
$1,283
2021
$1,742
2020
$1,003
2019
$751
2018
$452
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Eli Lilly and Company
$1,447
Medtronic, Inc.
$142
GlaxoSmithKline, LLC.
$70
PFIZER INC.
$65
Gilead Sciences, Inc.
$53
Novartis Pharmaceuticals Corporation
$53
Sumitomo Pharma America, Inc.
$45
Bayer Healthcare Pharmaceuticals Inc.
$34
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
$34
Novo Nordisk Inc
$30
Phathom Pharmaceuticals, Inc.
$30
Lilly USA, LLC
$28
Dexcom, Inc.
$19
AstraZeneca Pharmaceuticals LP
$19
Top 3 companies account for 80.1% of 2024 payments
All-time payments by company (2018-2024) ›
Eli Lilly and Company
$1,447
OptiNose US, Inc.
$751
Esperion Therapeutics, Inc.
$676
Optinose US, Inc.
$585
Amgen Inc.
$488
Kowa Pharmaceuticals America, Inc.
$366
Medtronic, Inc.
$308
Boston Scientific Corporation
$306
Gilead Sciences, Inc.
$295
AbbVie Inc.
$215
GlaxoSmithKline, LLC.
$204
Lilly USA, LLC
$179
PFIZER INC.
$172
Novartis Pharmaceuticals Corporation
$170
Astellas Pharma US Inc
$158
Merck Sharp & Dohme LLC
$140
Merck Sharp & Dohme Corporation
$140
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$124
Horizon Therapeutics plc
$119
IDORSIA PHARMACEUTICALS US INC
$119
Lundbeck LLC
$105
ABBVIE INC.
$98
Bayer Healthcare Pharmaceuticals Inc.
$94
JAZZ PHARMACEUTICALS INC.
$85
AstraZeneca Pharmaceuticals LP
$79
Takeda Pharmaceuticals U.S.A., Inc.
$77
Alfasigma USA, Inc.
$75
Hologic, LLC
$66
Scilex Pharmaceuticals Inc.
$66
Otsuka America Pharmaceutical, Inc.
$60
Stryker Corporation
$59
BioFire Diagnostics, LLC
$58
Allergan, Inc.
$55
Biohaven Pharmaceuticals, Inc.
$53
Regeneron Healthcare Solutions, Inc.
$49
Almatica Pharma LLC
$48
Boehringer Ingelheim Pharmaceuticals, Inc.
$46
Sumitomo Pharma America, Inc.
$45
Novo Nordisk Inc
$44
Axsome Therapeutics, Inc.
$42
Bausch Health US, LLC
$40
Sunovion Pharmaceuticals Inc.
$37
ITI, Inc. (d/b/a Intra-Cellular Therapies, Inc.)
$34
Shire North American Group Inc
$34
Phathom Pharmaceuticals, Inc.
$30
Daiichi Sankyo Inc.
$30
Eisai Inc.
$28
Orexo US, Inc.
$28
Horizon Pharma plc
$26
Vanda Pharmaceuticals Inc.
$25
Sun Pharmaceutical Industries Inc.
$24
Biogen, Inc.
$24
Amarin Pharma Inc.
$24
Biohaven Pharmaceutical Holding Company Ltd.
$23
Assertio Therapeutics, Inc.
$23
AbbVie, Inc.
$20
Ferring Pharmaceuticals Inc.
$19
Genentech USA, Inc.
$19
Dexcom, Inc.
$19
Circassia Pharmaceuticals Inc
$19
RedHill Biopharma Inc.
$19
ACADIA Pharmaceuticals Inc
$17
Teva Pharmaceuticals USA, Inc.
$17
ARBOR PHARMACEUTICALS, INC.
$15
Collegium Pharmaceutical, Inc.
$14
Vertiflex, Inc.
$13
US WorldMeds, LLC
$12
Top 3 companies account for 32.3% of all-time payments
Associated products mentioned in payments ›
ADUHELM · AIMOVIG · AJOVY · APLENZIN · APTIMA · APTIOM · AZURE XT DR MRI SURESCAN · Aimovig · Androgel · BELSOMRA · BREZTRI · BioFire FilmArray · CAPLYTA · CHANTIX · COREVALVE EVOLUT R · DRIZALMA SPRINKLE · DUPIXENT · Dayvigo · Dexcom G6 Transmitter · ELIQUIS · EMGALITY · ENTRESTO · EUFLEXXA · FARXIGA · FASENRA · GEMTESA · GRALISE · Gralise · HETLIOZ · Horizant · INSIGNIA · JARDIANCE · Kerendia · LEQVIO · LINZESS · LOREEV XR · LYRICA · Livalo · Lucemyra/Lofexidine · MOUNJARO · MYDAYIS · MYRBETRIQ · Morphabond ER · Movantik · NEXLETOL · NEXLIZET · NUPLAZID · NURTEC ODT · Otezla · Ozempic · PAXLOVID · PENNSAID · PREVNAR - 13 · PREVNAR 13 · PREVNAR 20 · Q-GUIDE ELECTRODE · QULIPTA · QUVIVIQ · RAYOS · RELISTOR ORAL · RESONATE · REXULTI · SEGLENTIS · SQ-RX PULSE GENERATOR · STEGLATRO · SUNOSI · Sunosi · Superion ISS · THINPREP 2000 PROCESSOR · TOVIAZ · TRELEGY ELLIPTA · TRINTELLIX · TUDORZA PRESSAIR · ThinPrep · Trintellix · UBRELVY · VIMOVO · VOQUEZNA · VRAYLAR · Vascepa · XIFAXAN · XIFAXANIBSD · XTAMPZA · Xhance · Xofluza · ZAVZPRET · ZEPBOUND · ZTLido · ZTLido 30 POUCH in 1 CARTON 1 PATCH in 1 POUCH · Zubsolv
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 (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Internal medicine physicians within 10 mi
4,713
Per 100K population
47.9
County median income
$87,760
Nearest hospital
PROVIDENCE SAINT JOSEPH MEDICAL CTR
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 2024 |
| 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. Marsh is a mixed practice specialist, with above-average Medicare volume (top 1% in CA), with low-engagement industry engagement in the top 11% of CA peers, 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. Marsh experienced with allergy skin test?
Based on Medicare claims data, Dr. Marsh performed 8,720 allergy skin test 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. Marsh receive payments from pharmaceutical companies?
Yes. Dr. Marsh received a total of $8,900 from 67 companies across 346 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. Marsh's costs compare to other internal medicine physicians in Toluca Lake?
Dr. Marsh's average Medicare payment per service is $17. 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. Marsh) 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