Doctor profile · Federal record
Dr. William de Wolf, M.D.
Internal Medicine Physician (CMS: Internal Medicine) · Oakland, CA
- NPI 1538274055
- Accepts Medicare
- 48 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
Operates at 2 locations .
- Primary practice
-
350 30Th St Ste 100
Oakland, CA 946093422
(510) 204-8290 - Additional location
-
3100 Telegraph Ave
Oakland, CA 946093239 - Mailing address
-
10470 Old Placerville RD
Sacramento, CA 958272528
Credentials & registration
- NPI registered
- August 2006 — 20 yrs on file
- Profile last updated
- November 21, 2023
- Year of graduation
- 1978 — 48 yrs since
- Specialty taxonomy
- 207R00000X — NUCC code
- State license (1)
- California #G40902
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1538274055. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
466
Distinct HCPCS
5
Medicare allowed
$64,514
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99214 |
Established patient office or other outpatient visit, 30-39 minutes | 320 | 129 | $151 | |
99213 |
Established patient office or other outpatient visit, 20-29 minutes | 59 | 41 | $107 | |
G0439 |
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit | 52 | 52 | $153 | |
G0008 |
Administration of influenza virus vaccine | 18 | 17 | $36 | |
90694 |
Influenza vaccine, quadrivalent inactivated, 0.5 ml dosage | 17 | 16 | $75 |
In context: peer comparison
Among 78 peers in Oakland Internal Medicine Physician, average services per provider: 326. This provider delivers 1.4× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
1,016
Patients
319
Total drug cost
$16,290
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Atorvastatin Calcium | Generic | 135 | 50 | $1,632 |
| Losartan Potassium | Generic | 111 | 33 | $1,458 |
| Gabapentin | Generic | 82 | 29 | $2,087 |
| Lorazepam | Generic | 76 | 18 | $925 |
| Levothyroxine Sodium | Generic | 71 | 26 | $1,557 |
| Lisinopril | Generic | 66 | 20 | $642 |
| Amlodipine Besylate | Generic | 64 | 24 | $746 |
| Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) | Brand | 64 | 25 | $2,058 |
| Tamsulosin Hcl | Generic | 60 | 18 | $1,681 |
| Allopurinol | Generic | 53 | 18 | $906 |
Hospital affiliations
Frequently asked questions
What is Dr. William de Wolf's medical specialty?
Dr. William de Wolf practices Internal Medicine Physician in Oakland, CA.
Where does Dr. William de Wolf practice?
Dr. William de Wolf practices at 350 30Th St Ste 100, Oakland, CA 946093422. Office phone: 5102048290.
What is Dr. William de Wolf's NPI?
Dr. William de Wolf's National Provider Identifier (NPI) is 1538274055, issued by NPPES.
Does Dr. William de Wolf accept Medicare assignment?
Yes. Dr. William de Wolf accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. William de Wolf commonly perform?
Top Medicare-reported procedures in 2023: Established patient office or other outpatient visit (HCPCS 99214); Established patient office or other outpatient visit (HCPCS 99213); Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit (HCPCS G0439). Source: CMS Medicare Physician & Other Practitioners file.