Grace Gyungah Ahn, M.D.
NPI 1194923813ActiveIndividual· Emergency Medicine· San Francisco, CA
Emergency Medicine (M.D.) in San Francisco, California, trained at University of Michigan Medical School (class of 2006). Their prescriptions cost Medicare Part D more than their services did: $3,791 for 201 claims, against $1,595 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. reported $112.99 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1194923813 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 3, 2007 |
| Last updated in NPPES | Dec 13, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | A100922 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Emergency Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 16 |
|---|---|
| Services billed | 16 across 3 procedure codes |
| Paid by Medicare | $1,595 |
Part D prescriptions in 2024
| Prescriptions (claims) | 201 · 212 30-day fills |
|---|---|
| Patients | 133 |
| Total drug cost | $3,791 |
| Generic share | 90% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 2006 |
| Medicare specialty | Emergency Medicine |
Medical group
- Permanente Medical Group IncOakland, CA · 10,996 clinicians
Hospital affiliation
- Kaiser Foundation Hospital - Walnut CreekWalnut Creek, CA
Industry payments (Open Payments)
- 2025$112.99 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $112.99 | 1 |
What the 2025 payments were for
- Food and Beverage$112.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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