Doctor profile · Federal record
Dr. Grace Ahn, M.D.
Emergency Medicine Physician (CMS: Emergency Medicine) · San Francisco, CA
- NPI 1194923813
- Accepts Medicare
- 20 yrs in practice
- Female
- Group practice
- No sanctions
Practice & contact
- Primary practice
-
1001 Potrero Ave Ste 1E21
San Francisco, CA 941103518
(415) 206-8111 - Mailing address
-
1425 S Main St
Walnut Creek, CA 945965318
Credentials & registration
- NPI registered
- July 2007 — 19 yrs on file
- Profile last updated
- December 13, 2021
- Year of graduation
- 2006 — 20 yrs since
- Specialty taxonomy
- 207P00000X — NUCC code
- State license (1)
- California #A100922
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1194923813. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
15
Distinct HCPCS
1
Medicare allowed
$1,942
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
99284 |
Emergency department visit with moderate level of medical decision making | 15 | 14 | $129 |
In context: peer comparison
Among 87 peers in this city , average services per provider: 91. This provider delivers 0.2× the peer median.Medicare Part D · 2023
Top prescriptions
Total claims
26
Patients
26
Total drug cost
$196
| Drug | Type | Claims | Patients | Total cost |
|---|---|---|---|---|
| Ondansetron Odt (Ondansetron) | Brand | 15 | 15 | $92 |
| Doxycycline Monohydrate | Generic | 11 | 11 | $104 |
Frequently asked questions
What is Dr. Grace Ahn's medical specialty?
Dr. Grace Ahn practices Emergency Medicine Physician in San Francisco, CA.
Where does Dr. Grace Ahn practice?
Dr. Grace Ahn practices at 1001 Potrero Ave Ste 1E21, San Francisco, CA 941103518. Office phone: 4152068111.
What is Dr. Grace Ahn's NPI?
Dr. Grace Ahn's National Provider Identifier (NPI) is 1194923813, issued by NPPES.
Does Dr. Grace Ahn accept Medicare assignment?
Yes. Dr. Grace Ahn accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Grace Ahn commonly perform?
Top Medicare-reported procedures in 2023: Emergency department visit with moderate level of medical decision making (HCPCS 99284). Source: CMS Medicare Physician & Other Practitioners file.