Dr. John Williams, D.O.
What this data tells you about Dr. Williams
Dr. John Williams is an internal medicine specialist in Willits, CA, with 20 years of NPI registration. Based on federal Medicare data, Dr. Williams performed 2,486 Medicare services across 913 unique beneficiaries.
Between the years covered by Open Payments, Dr. Williams received a total of $6,634 from 34 pharmaceutical and/or device companies across 397 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. 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.
Medicare Practice Summary
Medicare Utilization ↗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 |
|---|---|---|---|
| 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. |
963 | $92 | $200 |
| 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. |
460 | $12 | $125 |
| 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. |
244 | $128 | $227 |
| 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. |
175 | $66 | $115 |
| Nursing facility visit, high complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves a high level of medical decision making and takes at least 45 minutes. |
173 | $111 | $211 |
| Office visit, established patient (10-19 min) An office visit for an existing patient lasting 10 to 19 minutes. The visit involves medical evaluation and management of the patient's condition. |
87 | $41 | $69 |
| Nursing facility visit, moderate complexity A follow-up visit by a healthcare provider at a nursing facility for an established patient. The visit involves moderate medical decision making and takes at least 30 minutes. |
85 | $68 | $143 |
| Initial nursing facility care, high complexity An initial visit by a healthcare provider to a patient in a nursing facility involving a high level of medical decision making, lasting at least 45 minutes. |
54 | $138 | $259 |
| Hemoglobin A1c test (diabetes monitoring) A blood test that measures your average blood sugar levels over the past two to three months. |
48 | $10 | $20 |
| Osteopathic manipulative treatment, 1-2 body regions A hands-on technique used by osteopathic physicians to diagnose, treat, and prevent illness or injury by moving a patient's muscles and joints. This specific code covers treatment involving one or two distinct areas of the body. |
36 | $22 | $50 |
| 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. |
23 | $12 | $50 |
| New patient office visit, complex (60-74 min) | 23 | $138 | $322 |
| Assessment of emotional or behavioral problems An evaluation to identify and understand emotional or behavioral issues. This process involves reviewing symptoms and behaviors to determine the nature of the concerns. |
22 | $3 | $10 |
| Destruction of skin growth, 15 or more growths | 21 | $111 | $211 |
| Annual wellness visit, follow-up A follow-up annual wellness visit that includes a personalized prevention plan of service. |
20 | $132 | $184 |
| Urinalysis, manual A manual laboratory examination of a urine sample to check for various substances and cells. |
18 | $3 | $15 |
| Blood draw (venipuncture) Insertion of a needle into a vein to collect a blood sample. |
17 | $8 | $15 |
| 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. |
17 | $6 | $9 |
Industry Payment Transparency
Open Payments through 2024 ↗Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
Payments by company (2024)
All-time payments by company (2018-2024) ›
Associated products mentioned in payments ›
Most payments (99%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
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 clinical cardiology specialist, with above-average Medicare volume (top 13% in CA), with low-engagement industry engagement in the top 13% of CA peers, with 20 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
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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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