Peter Keywon Ahn, NURSE PRACTITIONER
NPI 1568909901ActiveIndividual· Nurse Practitioner, Family· Winnetka, CA
Nurse Practitioner, Family (NURSE PRACTITIONER) with El Proyecto del Barrio Inc, practicing in Winnetka, California. Their prescriptions cost Medicare Part D more than their services did: $143,574 for 1,114 claims, against $363.30 paid for services in 2024. Novo Nordisk Inc was the largest of 10 companies reporting payments in 2025, $799.54 in all, mostly food and beverage.
Overview
| NPI | 1568909901 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NURSE PRACTITIONER |
| Sole proprietor | No |
| NPI issued | Jan 24, 2017 |
| Last updated in NPPES | Aug 15, 2023 |
| Certified by provider | Aug 15, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | NP95005656 | 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 - Nurse Practitioner (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 33 |
|---|---|
| Services billed | 42 across 1 procedure code |
| Paid by Medicare | $363.30 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,114 · 2,314 30-day fills |
|---|---|
| Patients | 162 |
| Total drug cost | $143,574 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- El Proyecto del Barrio IncAzusa, CA · 27 clinicians
Industry payments (Open Payments)
- 2025$799.54 · 54 payments from 10 companies
- 2024$756.89 · 65 payments from 9 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $177.35 | 5 |
| Amgen Inc. | $176.02 | 34 |
| Lilly USA, LLC | $135.20 | 6 |
| Astrazeneca Pharmaceuticals LP | $116.42 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $61.50 | 2 |
What the 2025 payments were for
- Food and Beverage$799.54 · 54 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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