Mubashir Mahmood, M.D.
NPI 1316997398ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Knoxville, TN
Internal Medicine, Endocrinology, Diabetes & Metabolism (M.D.) with Healthstar Physicians PC, practicing in Knoxville, Tennessee. Their prescriptions cost Medicare Part D more than their services did: $6,750,543 for 13,111 claims, against $85,306 paid for services in 2024. Lilly USA, LLC was the largest of 31 companies reporting payments in 2025, $4,055 in all, mostly food and beverage. Lists University Health System, Inc as a hospital affiliation.
Overview
| NPI | 1316997398 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 11, 2006 |
| Last updated in NPPES | Dec 10, 2025 |
| Certified by provider | Dec 10, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | MD33965 | TN |
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 - Endocrinology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 365 |
|---|---|
| Services billed | 8,697 across 104 procedure codes |
| Paid by Medicare | $85,306 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,111 · 27,915 30-day fills |
|---|---|
| Patients | 1,311 |
| Total drug cost | $6,750,543 |
| Generic share | 60% of claims |
Education and affiliations
| Graduation year | 1991 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Healthstar Physicians PCNewport, TN · 88 clinicians
Hospital affiliation
- University Health System, IncKnoxville, TN
Industry payments (Open Payments)
- 2025$4,055 · 249 payments from 31 companies
- 2024$3,428 · 238 payments from 26 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Lilly USA, LLC | $459.39 | 32 |
| Amgen Inc. | $361.00 | 20 |
| Dexcom, Inc. | $349.87 | 18 |
| Insulet Corporation | $303.25 | 20 |
| Novo Nordisk Inc | $286.67 | 16 |
What the 2025 payments were for
- Food and Beverage$4,055 · 249 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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