Doctor profile · Federal record
Dr. William Ahnn, M.D.
Anesthesiology Physician (CMS: Anesthesiology) · Pain Medicine (Anesthesiology) Physician · San Bernardino, CA
- NPI 1457338683
- Accepts Medicare
- MIPS 85.0 / 100 · 2023
- 57 yrs in practice
- Male
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
2101 N Waterman Ave
San Bernardino, CA 924044836
(909) 883-3711 - Mailing address
-
210 N Tustin Ave
Santa Ana, CA 927053807
Credentials & registration
- NPI registered
- December 2005 — 21 yrs on file
- Profile last updated
- November 10, 2015
- Year of graduation
- 1969 — 57 yrs since
- Specialty taxonomy
- 207L00000X — NUCC code
- State license (1)
- California #A31405
- Medicaid
- CA #00A314051
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1457338683. Last verified May 11, 2026.Open Payments
Industry payments received
All-time total
$58
Transactions
2
Manufacturers
1
| Payer (manufacturer) | Industry | Txns | Amount |
|---|---|---|---|
| Ethicon US, LLC | 2 | $58.47 |
By nature of payment
Hospital affiliations
Frequently asked questions
What is Dr. William Ahnn's medical specialty?
Dr. William Ahnn practices Anesthesiology Physician in San Bernardino, CA.
Where does Dr. William Ahnn practice?
Dr. William Ahnn practices at 2101 N Waterman Ave, San Bernardino, CA 924044836. Office phone: 9098833711.
What is Dr. William Ahnn's NPI?
Dr. William Ahnn's National Provider Identifier (NPI) is 1457338683, issued by NPPES.
Does Dr. William Ahnn accept Medicare assignment?
Yes. Dr. William Ahnn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.