Doctor profile · Federal record
Dr. William O'Connor, M.D.
Family Medicine Physician (CMS: Family Practice) · Vacaville, CA
- NPI 1639127632
- Accepts Medicare
- 45 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
300 Mason St.
Vacaville, CA 956884506
(707) 446-0422
fax (707) 446-1655
Credentials & registration
- NPI registered
- May 2006 — 20 yrs on file
- Profile last updated
- December 9, 2014
- Year of graduation
- 1981 — 45 yrs since
- Specialty taxonomy
- 207Q00000X — NUCC code
- State license (1)
- California #G048496
- Medicaid
- CA #00G484960
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1639127632. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
835
Distinct HCPCS
10
Medicare allowed
$120,618
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99215 |
Established patient office or other outpatient visit, 40-54 minutes | 372 | 105 | $197 | |
G2212 |
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 | 144 | 65 | $35 | |
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 113 | 63 | $133 | |
97535 |
Training for self-care or home management, each 15 minutes | 45 | 30 | $38 | |
11312 |
Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 1.1-2.0 cm | 38 | 18 | $168 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 33 | 24 | $90 | |
17004 |
Destruction of precancer skin growth, 15 or more growths | 30 | 14 | $200 | |
99205 |
New patient office or other outpatient visit, 60-74 minutes | 27 | 27 | $243 | |
17000 |
Destruction of precancer skin growth, 1 growth | 19 | 12 | $60 | |
11106 |
Incision biopsy, first skin growth | 14 | 12 | $187 |
In context: peer comparison
Among 14 peers in Vacaville Family Medicine Physician, average services per provider: 79. This provider delivers 11× the peer median.Open Payments
Industry payments received
All-time total
$629
Transactions
14
Manufacturers
6
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, INC. | 8 | $271.42 | |
| Axsome Therapeutics, INC. | 1 | $121.83 | |
| Abbvie INC. | 1 | $102.96 | |
| AstraZeneca Pharmaceuticals Lp | 2 | $97.60 | |
| Pfizer INC. | 1 | $17.44 | |
| Takeda Pharmaceuticals U.S.A., INC. | 1 | $17.34 |
By nature of payment
Medicare Part D · 2023
Top prescriptions
Total claims
984
Patients
247
Total drug cost
$20,651
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Metoprolol Succinate | Generic | 135 | 33 | $3,060 |
| Rosuvastatin Calcium | Generic | 132 | 36 | $2,707 |
| Levothyroxine Sodium | Generic | 100 | 22 | $1,573 |
| Metformin Hcl | Generic | 89 | 22 | $781 |
| Lisinopril | Generic | 85 | 18 | $1,004 |
| Amlodipine Besylate | Generic | 68 | 19 | $593 |
| Atorvastatin Calcium | Generic | 58 | 13 | $713 |
| Simvastatin | Generic | 50 | 15 | $800 |
| Hydrochlorothiazide | Generic | 45 | 12 | $252 |
| Ezetimibe | Generic | 42 | 0 | $4,718 |
Hospital affiliations
Frequently asked questions
What is Dr. William O'Connor's medical specialty?
Dr. William O'Connor practices Family Medicine Physician in Vacaville, CA.
Where does Dr. William O'Connor practice?
Dr. William O'Connor practices at 300 Mason St., Vacaville, CA 956884506. Office phone: 7074460422.
What is Dr. William O'Connor's NPI?
Dr. William O'Connor's National Provider Identifier (NPI) is 1639127632, issued by NPPES.
Does Dr. William O'Connor accept Medicare assignment?
Yes. Dr. William O'Connor accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William O'Connor commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99215); 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 (HCPCS G2212); Established patient office or other outpatient visit (HCPCS 99214). Source: CMS Medicare Physician & Other Practitioners file.