David Nah, DO
NPI 1477847127ActiveIndividual· Internal Medicine· Norman, OK
Internal Medicine (DO) in Norman, Oklahoma, trained at Pacific Nw Un of Hs, Col of Osteopathic Medicine (class of 2013). Their prescriptions cost Medicare Part D more than their services did: $2,486 for 40 claims, against $1,362 paid for services in 2024. Amgen Inc. reported $45.50 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1477847127 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 29, 2011 |
| Last updated in NPPES | Oct 20, 2026 |
| Certified by provider | Oct 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 9542 | OK |
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 - Internal Medicine (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 12 |
|---|---|
| Services billed | 19 across 4 procedure codes |
| Paid by Medicare | $1,362 |
Part D prescriptions in 2024
| Prescriptions (claims) | 40 · 71 30-day fills |
|---|---|
| Patients | 22 |
| Total drug cost | $2,486 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | Pacific Nw Un of Hs, Col of Osteopathic Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Internal Medicine |
Medical group
- Performance Health Medical Group, IncLaguna Hills, CA · 6 clinicians
Industry payments (Open Payments)
- 2025$45.50 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $45.50 | 2 |
What the 2025 payments were for
- Food and Beverage$45.50 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 45 internal medicine physicians in Norman · All internal medicine physicians in Oklahoma