Medicare Enrolled
Dr. Randall Williams, MD
Dermatology · Chico, 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. Williams 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. Williams
Dr. Randall Williams is a dermatology specialist in Chico, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. Williams performed 56,675 Medicare services across 19,249 unique beneficiaries.
Between the years covered by Open Payments, Dr. Williams received a total of $34,643 from 92 pharmaceutical and/or device companies across 2153 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in dermatology. 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. Williams 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
$34,643 industry payments
Medicare Practice Summary
Medicare Utilization ↗56,675
Medicare services
Top 1% in CA for dermatology
19,249
Unique beneficiaries
$20
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~2,983 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 |
|---|---|---|---|
| Romosozumab injection (Evenity) for osteoporosis | 13,650 | $8 | $14 |
| Denosumab injection (Prolia/Xgeva) | 11,220 | $18 | $29 |
| Extended-release steroid injection (Zilretta) An injection of triamcinolone acetonide using a preservative-free, extended-release microsphere formulation. The dosage is measured in milligrams. |
6,210 | $13 | $40 |
| 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. |
3,326 | $65 | $151 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
1,965 | $8 | $16 |
| Comprehensive metabolic blood panel A blood test that measures a group of chemicals, including glucose, electrolytes, and kidney and liver function markers. |
1,240 | $10 | $42 |
| Lipid panel (cholesterol and triglycerides) A blood test that measures cholesterol and triglyceride levels. |
1,226 | $13 | $38 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
1,225 | $9 | $22 |
| 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. |
1,199 | $8 | $27 |
| Thyroid stimulating hormone (TSH) test A blood test that measures the level of thyroid stimulating hormone to evaluate thyroid function. |
1,008 | $16 | $69 |
| Vitamin D level test A blood test to measure the amount of Vitamin D-3 in your body. |
967 | $29 | $67 |
| Vitamin B-12 level test A blood test that measures the amount of vitamin B-12 in your body. |
965 | $15 | $75 |
| Folic acid level test A blood test that measures the amount of folic acid in the serum. |
924 | $14 | $75 |
| Midazolam injection, per 1 mg Administration of midazolam hydrochloride, a sedative medication, measured in 1 mg increments. |
895 | $0 | $1 |
| High-sensitivity C-reactive protein test A blood test that measures high-sensitivity C-reactive protein to detect infection or inflammation. |
884 | $13 | $48 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
786 | $135 | $201 |
| Urinalysis with microscopic exam A urine test performed manually that includes examining the sample under a microscope to check for abnormalities. |
744 | $3 | $15 |
| Flu vaccine administration This procedure involves the administration of the influenza virus vaccine. It covers the process of delivering the vaccine to the patient. |
500 | $32 | $34 |
| Flu vaccine, high-dose High-dose seasonal influenza vaccine for adults aged 65 and older. Contains four times the antigen of standard-dose flu vaccines (60 mcg per strain), split-virus formulation, preservative-free, single-dose syringe. |
485 | $71 | $106 |
| 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. |
420 | $25 | $50 |
| 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. |
409 | $2 | $11 |
| 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. |
388 | $10 | $47 |
| Steroid injection (triamcinolone) A 10 mg injection of triamcinolone acetonide, a corticosteroid medication. This code specifies the drug and dosage administered. |
344 | $1 | $3 |
| 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. |
325 | $18 | $27 |
| PSA test (prostate cancer screening) | 280 | $18 | $80 |
| 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. |
280 | $69 | $214 |
| Free thyroxine (T4) test A blood test that measures the level of free thyroxine, a thyroid hormone, in the bloodstream. |
277 | $9 | $42 |
| 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. |
263 | $17 | $32 |
| PSA test (prostate cancer screening) A blood test that measures the level of prostate-specific antigen to screen for prostate cancer. |
240 | $19 | $80 |
| Joint injection, major joint Removal of fluid from a large joint and/or injection of medication into the joint space. |
198 | $53 | $121 |
| Moderate sedation during GI endoscopy Sedation services provided by the physician performing a gastrointestinal endoscopic procedure. This requires an independent trained observer to assist in monitoring the patient. |
158 | $46 | $80 |
| Injection, fentanyl citrate, 0.1 mg | 154 | $1 | $9 |
| Free PSA test A blood test that measures the amount of unbound prostate-specific antigen in the blood. |
139 | $18 | $22 |
| Drug test with direct observation A drug screening test performed under direct observation to ensure the sample is provided correctly. This method is used to verify the integrity of the specimen collection process. |
132 | $12 | $42 |
| 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. |
126 | $5 | $43 |
| Urine microalbumin test A laboratory test that measures the amount of a specific protein called microalbumin in a urine sample. This analysis helps assess kidney function. |
123 | $6 | $16 |
| 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. |
111 | $21 | $26 |
| Liver function blood test panel | 108 | $8 | $27 |
| Ceftriaxone antibiotic injection This code represents the administration of ceftriaxone sodium, an antibiotic medication. The charge is calculated for every 250 mg of the drug administered. |
106 | $0 | $4 |
| Colonoscopy with biopsy A procedure to collect tissue samples from the large intestine using a flexible tube with a camera. The samples are examined to check for abnormalities or disease. |
99 | $338 | $742 |
| Ferritin level test (iron stores) A blood test that measures the level of ferritin, a protein that stores iron in the body. |
89 | $13 | $65 |
| Basic metabolic blood panel A blood test that measures a group of basic chemicals, including total calcium levels. |
88 | $8 | $32 |
| Bone density scan (DEXA) of hip, pelvis, and spine This test measures bone density in the hip, pelvis, and spine to assess bone strength. It also includes an assessment for spine fractures. |
87 | $55 | $190 |
| COVID-19 vaccine administration Administration of a single dose of the coronavirus vaccine. |
85 | $40 | $40 |
| COVID-19 vaccine (Moderna bivalent) An intramuscular injection of the SARS-CoV-2 vaccine containing 50 micrograms in a 0.5 mL dose. |
85 | $143 | $250 |
| Ketorolac injection, per 15 mg An injection of ketorolac tromethamine, a nonsteroidal anti-inflammatory drug, administered in doses measured per 15 mg. |
85 | $0 | $9 |
| X-ray of lower and sacral spine, minimum of 4 views An X-ray imaging test of the lower back and sacrum using at least four different angles to visualize the bones and joints. |
81 | $37 | $100 |
| Methylprednisolone acetate injection, 80 mg An injection of 80 mg of methylprednisolone acetate, a corticosteroid medication. |
80 | $9 | $26 |
| Ear wax removal by washing This procedure involves the removal of impacted ear wax using a washing technique. |
74 | $14 | $48 |
| Magnesium level test A blood test to measure the amount of magnesium in your body. This helps check for magnesium deficiency or excess. |
70 | $7 | $15 |
| 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. |
70 | $69 | $106 |
| 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. |
68 | $24 | $69 |
| Pneumonia vaccine administration This procedure involves the injection of a vaccine to protect against pneumococcal disease. It is administered by a healthcare provider. |
66 | $32 | $32 |
| 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. |
64 | $6 | $16 |
| 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. |
63 | $4 | $6 |
| Iron level test | 56 | $6 | $20 |
| 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. |
56 | $9 | $20 |
| 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. |
53 | $10 | $53 |
| Creatinine test (kidney function) A blood test that measures the amount of creatinine to assess kidney function or detect muscle injury. |
52 | $5 | $16 |
| Trabecular bone score calculation This procedure calculates the trabecular bone score using imaging data to assess bone microarchitecture. It includes interpretation and a report on fracture risk. |
51 | $33 | $45 |
| Pneumococcal vaccine, 23-valent A vaccine that protects against 23 types of pneumococcal bacteria. It is used to prevent infections caused by these bacteria. |
51 | $131 | $159 |
| 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. |
49 | $5 | $19 |
| 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. |
49 | $4 | $19 |
| Knee X-ray, 3 views An X-ray imaging test of the knee joint that captures three different angles to evaluate the bones and surrounding structures. |
46 | $31 | $64 |
| 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. |
42 | $48 | $182 |
| 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. |
40 | $4 | $16 |
| Influenza virus nucleic acid detection test A laboratory test that uses nucleic acid technology to detect multiple types of influenza virus. |
36 | $91 | $122 |
| 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. |
36 | $67 | $89 |
| 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. |
36 | $49 | $66 |
| 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. |
35 | $35 | $75 |
| 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. |
35 | $40 | $50 |
| Homocysteine level test A blood test that measures the amount of homocysteine, an amino acid, in the body. |
33 | $18 | $27 |
| Natriuretic peptide level test A blood test that measures the level of natriuretic peptide, a protein produced by the heart and blood vessels. |
33 | $38 | $69 |
| 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. |
31 | $5 | $16 |
| Stool test for hidden blood (FIT) A laboratory test that analyzes a stool sample to detect hidden blood using an immunoassay method. |
31 | $16 | $27 |
| Vitamin B-12 injection An injection of vitamin B-12 (cyanocobalamin) with a dose of up to 1000 mcg. |
31 | $1 | $9 |
| 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. |
30 | $37 | $48 |
| Upper GI endoscopy with biopsy A procedure to collect tissue samples from the esophagus, stomach, or upper small intestine using a flexible tube with a camera. The samples are examined to check for abnormalities. |
29 | $323 | $604 |
| 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. |
29 | $42 | $85 |
| Simple drainage of skin abscess A minor procedure to drain a localized collection of pus from the skin. The abscess is opened to allow the fluid to escape and promote healing. |
26 | $80 | $333 |
| 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. |
26 | $25 | $58 |
| Initial preventive physical examination, new Medicare beneficiary A comprehensive preventive health visit for new Medicare beneficiaries during their first 12 months of enrollment. The service is conducted as a face-to-face visit and is limited to preventive care. |
26 | $172 | $292 |
| 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. |
24 | $11 | $32 |
| 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. |
24 | $12 | $32 |
| Colon polyp removal with endoscopic snare This procedure removes polyps or growths from the large bowel using a flexible tube with a camera and a wire loop tool. The snare is used to cut off the growths during the examination. |
23 | $408 | $795 |
| 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. |
22 | $23 | $53 |
| Transitional care management, high complexity Coordination of care for a patient transitioning from a short-term hospital stay or other facility to home or another care setting. This service addresses a high-complexity medical problem. |
20 | $228 | $344 |
| X-ray of hand, minimum of 3 views An X-ray imaging test of the hand that captures at least three different angles to visualize the bones and joints. |
19 | $29 | $58 |
| Complete ultrasound of retroperitoneum An ultrasound examination of the structures located behind the abdominal cavity. |
18 | $84 | $176 |
| Colonoscopy for colorectal cancer screening A colonoscopy performed to screen for colorectal cancer in individuals who are not at high risk for the disease. |
18 | $300 | $572 |
| Kidney function blood test panel | 16 | $9 | $42 |
| 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. |
16 | $6 | $22 |
| Lipase level test A blood test that measures the amount of lipase, a fat-digesting enzyme, in your body. |
16 | $6 | $12 |
| Quadrivalent influenza vaccine, cell-culture derived A flu shot containing four strains of influenza virus, produced using cell culture technology rather than eggs. This formulation is free from preservatives and antibiotics. |
16 | $33 | $50 |
| Additional sedation, per 15 minutes Administration of a drug to deepen sedation during a procedure. This code covers each additional 15-minute increment of sedation beyond the initial period. |
16 | $9 | $17 |
| Destruction of precancerous skin growths, 2-14 This procedure involves the removal or destruction of two to fourteen precancerous skin lesions. It is performed to eliminate abnormal skin cells that have the potential to develop into cancer. |
15 | $5 | $28 |
| 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. |
15 | $28 | $58 |
| Pneumococcal conjugate vaccine (PCV15) An intramuscular injection of the 15-valent pneumococcal conjugate vaccine. This vaccine protects against 15 types of pneumococcal bacteria. |
15 | $241 | $413 |
| Colonoscopy for colorectal cancer screening, high risk A colonoscopy performed to screen for colorectal cancer in individuals identified as being at high risk for the disease. |
15 | $348 | $572 |
| Wrist X-ray, minimum 3 views An imaging test using X-rays to capture at least three different angles of the wrist bones and joints. |
14 | $33 | $64 |
| Ultrasound of head and neck soft tissue This procedure uses sound waves to create images of the soft tissues in the head and neck area. It allows for the visualization of structures beneath the skin without using radiation. |
13 | $96 | $212 |
| 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. |
13 | $10 | $22 |
| New patient office visit (30-44 min) An initial office visit for a new patient lasting between 30 and 44 minutes. This code is used when the total time spent on the date of the encounter falls within this range. |
13 | $73 | $184 |
| 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 | $84 | $217 |
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 ↗$34,643
Total received (2018-2024)
Avg $4,949/year across 7 years
Top 1% in CA for dermatology
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
92
Companies
2,153
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
$31,032 (89.6%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$3,611 (10.4%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$4,050
2023
$4,525
2022
$7,371
2021
$5,542
2020
$4,053
2019
$4,408
2018
$4,694
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
ABBVIE INC.
$791
PFIZER INC.
$411
Novo Nordisk Inc
$409
Lilly USA, LLC
$259
Amgen Inc.
$234
Boehringer Ingelheim Pharmaceuticals, Inc.
$217
Exact Sciences Corporation
$196
Daiichi Sankyo Inc.
$188
AstraZeneca Pharmaceuticals LP
$162
Corcept Therapeutics
$160
Abbott Laboratories
$138
Dexcom, Inc.
$89
Verity Pharmaceuticals Inc.
$86
Novartis Pharmaceuticals Corporation
$72
Esperion Therapeutics, Inc.
$67
Janssen Pharmaceuticals, Inc
$61
Pacira Pharmaceuticals Incorporated
$59
Optinose US, Inc.
$59
GlaxoSmithKline, LLC.
$49
Bayer Healthcare Pharmaceuticals Inc.
$43
Sumitomo Pharma America, Inc.
$36
Indivior Inc.
$34
AIMMUNE THERAPEUTICS, INC.
$31
Phathom Pharmaceuticals, Inc.
$31
Radius Health, Inc.
$20
Seqirus USA Inc
$19
Merck Sharp & Dohme LLC
$18
Astellas Pharma US Inc
$18
SANOFI PASTEUR INC.
$17
Otsuka America Pharmaceutical, Inc.
$17
E.R. Squibb & Sons, L.L.C.
$17
Cycle Pharmaceuticals Inc
$14
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$14
IDORSIA PHARMACEUTICALS US INC
$13
Top 3 companies account for 39.8% of 2024 payments
All-time payments by company (2018-2024) ›
Amgen Inc.
$6,083
Novo Nordisk Inc
$2,881
AstraZeneca Pharmaceuticals LP
$1,979
AbbVie Inc.
$1,956
PFIZER INC.
$1,952
ABBVIE INC.
$1,646
Salix Pharmaceuticals, a division of Bausch Health US, LLC
$1,607
Janssen Pharmaceuticals, Inc
$1,333
Lilly USA, LLC
$1,160
GlaxoSmithKline, LLC.
$1,146
Boehringer Ingelheim Pharmaceuticals, Inc.
$1,131
Corcept Therapeutics
$863
Merck Sharp & Dohme Corporation
$816
Amarin Pharma Inc.
$689
Daiichi Sankyo Inc.
$671
Allergan Inc.
$592
Takeda Pharmaceuticals U.S.A., Inc.
$549
Kowa Pharmaceuticals America, Inc.
$416
SANOFI-AVENTIS U.S. LLC
$413
Biohaven Pharmaceutical Holding Company Ltd.
$396
Esperion Therapeutics, Inc.
$377
Exact Sciences Corporation
$349
Allergan, Inc.
$330
Merck Sharp & Dohme LLC
$324
Biohaven Pharmaceuticals, Inc.
$288
Astellas Pharma US Inc
$254
Eisai Inc.
$252
Abbott Laboratories
$212
ARBOR PHARMACEUTICALS, INC.
$198
Sunovion Pharmaceuticals Inc.
$193
Flexion Therapeutics, Inc.
$189
SANOFI PASTEUR INC.
$166
Bayer HealthCare Pharmaceuticals Inc.
$166
AbbVie, Inc.
$160
E.R. Squibb & Sons, L.L.C.
$147
IDORSIA PHARMACEUTICALS US INC
$146
Mylan Specialty L.P.
$142
Teva Pharmaceuticals USA, Inc.
$140
Novartis Pharmaceuticals Corporation
$139
Tosoh Bioscience, Inc.
$121
Avanir Pharmaceuticals, Inc.
$119
Bayer Healthcare Pharmaceuticals Inc.
$118
Sanofi Pasteur Inc.
$116
Pacira Pharmaceuticals Incorporated
$101
FIDIA PHARMA USA INC.
$97
Shire North American Group Inc
$93
Dexcom, Inc.
$89
Verity Pharmaceuticals Inc.
$86
Seqirus USA Inc
$75
Upsher-Smith Laboratories LLC
$69
Purdue Pharma L.P.
$62
Optinose US, Inc.
$59
Radius Health, Inc.
$54
Scilex Pharmaceuticals Inc.
$53
Adlon Therapeutics L.P.
$52
Sumitomo Pharma America, Inc.
$52
MannKind Corporation
$52
IRONWOOD PHARMACEUTICALS, INC
$51
Bausch Health US, LLC
$40
Circassia Pharmaceuticals Inc
$37
Gilead Sciences, Inc.
$37
Indivior Inc.
$34
AIMMUNE THERAPEUTICS, INC.
$31
Mannkind Corporation
$31
Phathom Pharmaceuticals, Inc.
$31
UPSHER-SMITH LABORATORIES LLC
$27
DEXCOM, INC.
$25
Nestle HealthCare Nutrition Inc.
$21
Medtronic USA, Inc.
$20
DePuy Synthes Sales Inc.
$19
VBI Vaccine (Delaware) Inc.
$19
Myovant Sciences Inc.
$19
Hologic, LLC
$18
Medtronic, Inc.
$17
Phadia US Inc.
$17
Otsuka America Pharmaceutical, Inc.
$17
Bioventus LLC
$17
Olympus America Inc.
$16
Novavax Inc
$15
ACADIA Pharmaceuticals Inc
$15
Cycle Pharmaceuticals Inc
$14
TherapeuticsMD, Inc.
$14
Genentech USA, Inc.
$14
Xeris Pharmaceuticals, Inc.
$13
Kyowa Kirin, Inc.
$13
QOL Medical, LLC
$13
Orexigen Therapeutics, Inc.
$13
Arbor Pharmaceuticals, Inc.
$13
Amneal Pharmaceuticals LLC
$12
IBSA Pharma Inc.
$12
Ironwood Pharmaceuticals, Inc
$11
Relievant Medsystems, Inc.
$9
Top 3 companies account for 31.6% of all-time payments
Associated products mentioned in payments ›
ADACEL · ADHANSIA XR · ADJUVANTED · AFREZZA · AIA-PACK Calibrator Set · AIRSUPRA · AJOVY · ANORO · ANORO ELLIPTA · APLENZIN · APTIOM · AREXVY · AUSTEDO · Aimovig · AirDuo Digihaler · Amitiza · Androgel · B12 · BASAGLAR · BELSOMRA · BEVESPI AEROSPHERE · BEXSERO · BIJUVA · BREO · BREZTRI · BYDUREON · Belviq · CAMZYOS · CAPVAXIVE · CHANTIX · COLOGUARD · COLOGUARD DNA CAPTURE REAGENTS · CONTRAVE · CREON · Cologuard Collection Kit · Creon · DEXCOM G6 TRANSMITTER · Dayvigo · Dexcom G6 Transmitter · Durolane · ELIQUIS · EMGALITY · ENTRESTO · EUCRISA · EVENITY · EVUSHELD · Edarbi · Edarbyclor · Exparel · FARXIGA · FASENRA · FLUBLOK QUADRIVALENT · FLUBLOK QUADRIVALENT NORTHERN HEMISPHERE · FLUCELVAX QUADRIVALENT · FLUZONE HIGH-DOSE · FLUZONE QUADRIVALENT NORTHERN HEMISPHERE · FREESTYLE LIBRE 3 · Fluad · Fluad Quadrivalent · FreeStyle Libre · GARDASIL 9 · GEMTESA · GVOKE PFS · HYALGAN · Horizant · Hymovis · Hysteroscopes Rod Lens · INJECTAFER · INTELLIS ADAPTIVESTIM · INVOKANA · ImmunoCAP · Intracept · Iovera · JANUVIA · JARDIANCE · JOT DX · Kerendia · Korlym · LEQVIO · LINZESS · LONHALA MAGNAIR · LYRICA · Linzess · Livalo · MENACTRA · MONOVISC · MOUNJARO · MOVANTIK · MYDAYIS · MYFEMBREE · MYRBETRIQ · MitraClip System · Myrbetriq · NEXLETOL · NEXLIZET · NOURIANZ · NOVAVAX COVID-19 VACCINE · NUCALA · NUEDEXTA · NUPLAZID · NURTEC ODT · OFEV · Ormalvi · Otezla · Ozempic · PNEUMOVAX 23 · PREMARIN · PREVNAR - 13 · PREVNAR 13 · PREVNAR 20 · PROCLAIM · Perforomist · PreHevbrio · Proclaim Family of SCS IPGs · Prolia · QUDEXY XR TOPIRAMATE EXTENDED RELEASE CAPSULES · QULIPTA · QUVIVIQ · RESTORE · REXULTI · RYBELSUS · RYTARY · Repatha · Rybelsus · SHINGRIX · SOLIQUA · SOLIQUA 100/33 · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · SUBLOCADE · SYMBICORT · SYMPROIC · SYNVISC-ONE · Saxenda · Sucraid · Synthroid · TOSYMRA · TOUJEO · TRADJENTA · TRELEGY ELLIPTA · TRINTELLIX · TRULICITY · TRUMENBA · TUDORZA PRESSAIR · ThinPrep · Tirosint · Tlando · Tresiba · Trintellix · Tymlos · UBRELVY · Utibron · VERQUVO · VIBERZI · VOQUEZNA · VRAYLAR · VYNDAMAX · VYVANSE · Vascepa · Veozah · Victoza · Vyvanse · WELLBUTRIN · Wegovy · XARELTO · XIFAXAN · Xhance · Xofluza · Yupelri · ZEMBRACE SYMTOUCH SUMATRIPTAN INJECTION · ZENPEP · ZEPBOUND · ZOSTAVAX · ZTLido · Zilretta
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 (90%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 1% for dermatology in CA.
Geographic Context
Dermatologists within 10 mi
18
Per 100K population
8.6
County median income
$68,574
Nearest hospital
ENLOE HEALTH
0.0 mi
0.0 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. Williams is a mixed practice specialist, with above-average Medicare volume (top 1% in CA), with low-engagement industry engagement in the top 1% 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. Williams experienced with romosozumab injection (evenity) for osteoporosis?
Based on Medicare claims data, Dr. Williams performed 13,650 romosozumab injection (evenity) for osteoporosis 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. Williams receive payments from pharmaceutical companies?
Yes. Dr. Williams received a total of $34,643 from 92 companies across 2,153 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. Williams's costs compare to other dermatologists in Chico?
Dr. Williams's average Medicare payment per service is $20. 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. Williams) 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.
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