Merrill Marshall Ahrens, MD
NPI 1194839225ActiveIndividual· Internal Medicine· Portland, OR
Internal Medicine (MD) in Portland, Oregon, trained at Northwestern University Feinberg Medical School (class of 1989). In 2024 Medicare paid $23,950 for 215 patients, and Part D covered 268 of their prescriptions, 88% of them generic.
Overview
| NPI | 1194839225 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Aug 18, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | ORMD17736 | OR |
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 - Internal Medicine (OR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 215 |
|---|---|
| Services billed | 541 across 34 procedure codes |
| Paid by Medicare | $23,950 |
Part D prescriptions in 2024
| Prescriptions (claims) | 268 · 598 30-day fills |
|---|---|
| Patients | 115 |
| Total drug cost | $28,068 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- Legacy Clinics LLCPortland, OR · 713 clinicians
- Legacy Emanuel Hospital and Health CenterPortland, OR · 238 clinicians
- Legacy Good Samaritan Hospital and Medical CenterPortland, OR · 191 clinicians
Hospital affiliations
- Legacy Emanuel Medical CenterPortland, OR
- Legacy Good Samaritan Medical CenterPortland, OR
Other facilities
- Amedisys Home Health CareHome health agency · Portland, 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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