Dr. William O'Connor, M.D.
What this data tells you about Dr. O'Connor
Dr. William O'Connor is a family medicine specialist in Vacaville, CA, with 19 years of NPI registration. Based on federal Medicare data, Dr. O'Connor performed 835 Medicare services across 370 unique beneficiaries.
Between the years covered by Open Payments, Dr. O'Connor received a total of $5,869 from 20 pharmaceutical and/or device companies across 288 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in family 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. O'Connor 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, 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. |
372 | $140 | $310 |
| Prolonged office E/M service, first 15 minutes This code is used for additional time spent by a physician beyond the maximum required time of a primary office or outpatient evaluation and management service. It is billed in 15-minute increments based on total time spent on the date of the primary service. |
144 | $26 | $175 |
| 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. |
113 | $92 | $210 |
| Self-care/home management training, per 15 min Instruction provided to help patients manage their own care or daily activities at home. The service is billed in 15-minute increments. |
45 | $29 | $75 |
| Shaving of skin growth, 1.1-2.0 cm Removal of a skin growth by shaving the surface of the skin. The procedure is performed on the face, ears, eyelids, nose, lips, or mouth and involves a lesion measuring between 1.1 and 2.0 centimeters. |
38 | $131 | $225 |
| 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. |
33 | $66 | $125 |
| Destruction of 15 or more precancerous skin growths This procedure involves the removal or destruction of fifteen or more precancerous skin lesions. It is performed to treat abnormal skin cells that have the potential to develop into cancer. |
30 | $158 | $282 |
| New patient office visit, complex (60-74 min) | 27 | $150 | $306 |
| 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. |
19 | $48 | $125 |
| Skin growth biopsy, first lesion A minor surgical procedure to remove a small sample of tissue from a skin growth for laboratory examination. |
14 | $149 | $288 |
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 (100%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians. Total industry engagement is in the top 7% for family medicine in CA.
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. O'Connor is a clinical cardiology specialist, with above-average Medicare volume (top 27% in CA), with low-engagement industry engagement in the top 7% 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. O'Connor experienced with office visit, established patient, complex (40-54 min)?
Does Dr. O'Connor receive payments from pharmaceutical companies?
How do Dr. O'Connor's costs compare to other family medicine physicians in Vacaville?
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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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