Physician Profile
Unclaimed ProfileAbout O'CONNOR
William Thomas O'Connor, M.D. is a healthcare provider in Vacaville, CA specializing in family practice. William trained at University of Cincinnati College of Medicine, graduating in 1981. William is also listed as specializing in family medicine. According to Medicare claims data, William cared for 379 Medicare patients across 974 services.
Summarised automatically from public NPI registry and CMS Medicare data. Not written or reviewed by this provider. Claim this profile to replace it.
Education & Training
Areas of Expertise
Licensing & Certification
Source: NPPES NPI Registry
Contact Information
- (707) 446-0422
- Email not available
Practice Locations
300 MASON ST.
Vacaville, CA 95688
Procedures Most Often Billed to Medicare
974 services · 379 patients · 10 distinct codes
| Procedure | Type | Code | Services |
|---|---|---|---|
| Destruction of skin growth, 1-14 growths | Procedure | 17110 |
53 |
| Destruction of precancer skin growth, 2-14 growths | Procedure | 17003 |
36 |
| Destruction of precancer skin growth, 1 growth | Procedure | 17000 |
27 |
| Destruction of precancer skin growth, 15 or more growths | Procedure | 17004 |
23 |
| Training for self-care or home management, each 15 minutes | Treatment | 97535 |
112 |
| Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more | Office visit | 99215 |
410 |
| Prolonged office or other outpatient evaluation and management service(s) beyond the maximum required time of the primary procedure which has been selected using total time on the date of the primary service; each additional 15 minutes by the physician or | Billing code | G2212 |
170 |
| Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more | Office visit | 99214 |
105 |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
23 |
| New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more | Office visit | 99205 |
15 |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Other family practices in Vacaville 8
Same specialty, same city.
Trained at University of Cincinnati College of Medicine 8
Other providers in the same specialty who trained at the same institution.
Class of 1981 at University of Cincinnati College of Medicine 8
Providers who graduated from the same medical school in the same year.
More connections — 8 related providers in 1 group
Also performs Destruction of skin growth, 1-14 growths 8
Providers in CA who bill this service to Medicare most often.
Common questions
What does Dr. O'Connor specialize in?
Dr. O'Connor is a family practice in Vacaville, CA. This is the primary taxonomy recorded against the NPI in the federal registry, listed there as “FAMILY PRACTICE”.
NPI registry
Where is Dr. O'Connor located?
Dr. O'Connor is listed at 300 MASON ST., Vacaville, CA 95688. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. O'Connor's phone number?
The number on file is (707) 446-0422. Guide.md cannot book appointments or pass on messages — please call the office directly.
NPI registry
What is Dr. O'Connor's NPI number?
Dr. O'Connor's National Provider Identifier is 1639127632. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. O'Connor go to medical school?
Dr. O'Connor attended University of Cincinnati College of Medicine, graduating in 1981. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. O'Connor been practicing?
Dr. O'Connor has 45 years experience. Calculated from a graduation year of 1981, reported in the CMS National Downloadable File.
CMS public data
What does Dr. O'Connor do most often?
According to Medicare billing data, Dr. O'Connor performs procedures including destruction of skin growth, 1-14 growths, destruction of precancer skin growth, 2-14 growths and destruction of precancer skin growth, 1 growth; provides treatments such as training for self-care or home management, each 15 minutes, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. O'Connor confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. O'Connor. If this is you, claiming it is free.
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Claim this profileProvider data sourced from the NPPES NPI Registry and CMS public datasets. Information is provided for reference and is not medical advice.