Lisa J. Mahan, MD
NPI 1508824285ActiveIndividual· Internal Medicine· Memphis, TN
Internal Medicine (MD) with Osh Mi Physicians Group, PC, practicing in Memphis, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $204,367 for 1,788 claims, against $5,269 paid for services in 2024. Novo Nordisk Inc was the largest of 6 companies reporting payments in 2025, $286.27 in all, mostly food and beverage. Lists Methodist Hospitals of Memphis as a hospital affiliation.
Overview
| NPI | 1508824285 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 3, 2006 |
| Last updated in NPPES | Mar 31, 2026 |
| Certified by provider | Mar 31, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 35126 | TN |
| Emergency Medicine | 207P00000X | 35126 | TN |
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 (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 43 |
|---|---|
| Services billed | 100 across 14 procedure codes |
| Paid by Medicare | $5,269 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,788 · 3,544 30-day fills |
|---|---|
| Patients | 385 |
| Total drug cost | $204,367 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Internal Medicine |
| Secondary specialties | Emergency Medicine |
Medical group
- Osh Mi Physicians Group, PCRaleigh, NC · 157 clinicians
Hospital affiliation
- Methodist Hospitals of MemphisMemphis, TN
Industry payments (Open Payments)
- 2025$286.27 · 9 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $141.44 | 2 |
| Xeris Pharmaceuticals, Inc. | $62.89 | 3 |
| Abbott Laboratories | $24.53 | 1 |
| Insulet Corporation | $24.37 | 1 |
| Bayer Healthcare Pharmaceuticals Inc. | $19.12 | 1 |
What the 2025 payments were for
- Food and Beverage$286.27 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine providers in Memphis
- 1538276704
- 1225067499
- 1376738906
- 1467401323
- 1790589208
- 1437330354
- 1306218235
- 1376709451
- 1578938957
- 1063716264
- 1306089206
- 1881640118