Wooin Ahn, M.D.
NPI 1366608267ActiveIndividual· Internal Medicine, Nephrology· Portland, OR
Internal Medicine, Nephrology (M.D.) with University Professional Services, practicing in Portland, Oregon. Their prescriptions cost Medicare Part D more than their services did: $65,350 for 257 claims, against $37,383 paid for services in 2024. Lists Adventist Health Portland and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1366608267 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 31, 2008 |
| Last updated in NPPES | Jun 30, 2023 |
| Certified by provider | Jun 30, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Nephrology Primary | 207RN0300X | MD213267 | OR |
| Internal Medicine | 207R00000X | MD213267 | OR |
| Internal Medicine | 207R00000X | 249946 | MA |
| Internal Medicine, Nephrology | 207RN0300X | 249946 | MA |
| Internal Medicine, Nephrology | 207RN0300X | 270920 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nephrology (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 135 |
|---|---|
| Services billed | 384 across 17 procedure codes |
| Paid by Medicare | $37,383 |
Part D prescriptions in 2024
| Prescriptions (claims) | 257 · 497 30-day fills |
|---|---|
| Patients | 62 |
| Total drug cost | $65,350 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Nephrology |
| Telehealth | Offers telehealth |
Medical group
- University Professional ServicesBeaverton, OR · 1,724 clinicians
Hospital affiliations
- Adventist Health PortlandPortland, OR
- Hillsboro Medical CenterHillsboro, OR
- Ohsu Hospital and ClinicsPortland, OR
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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