Michael A. Henderson, MD
NPI 1639125495ActiveIndividual· Internal Medicine· Oak Ridge, TN
Internal Medicine (MD) in Oak Ridge, Tennessee, trained at Brody School of Medicine at East Carolina University (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $1,398,209 for 13,812 claims, against $220,971 paid for services in 2024. Abbvie Inc. was the largest of 14 companies reporting payments in 2025, $807.63 in all, mostly food and beverage.
Overview
| NPI | 1639125495 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 25, 2006 |
| Last updated in NPPES | May 7, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 39895 | 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 - Internal Medicine (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 473 |
|---|---|
| Services billed | 8,677 across 125 procedure codes |
| Paid by Medicare | $220,971 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,812 · 30,670 30-day fills |
|---|---|
| Patients | 775 |
| Total drug cost | $1,398,209 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | Brody School of Medicine at East Carolina University |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Internal Medicine |
Medical group
- Summit Medical Group, PLLCKnoxville, TN · 652 clinicians
Hospital affiliations
- Methodist Medical Center of Oak RidgeOak Ridge, TN
- Parkwest Medical CenterKnoxville, TN
- Physicians Regional Medical CenterPowell, TN
Other facilities
- Amedisys Home Health CareHome health agency · Knoxville, TN
Industry payments (Open Payments)
- 2025$807.63 · 56 payments from 14 companies
- 2024$842.02 · 51 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $204.32 | 15 |
| Glaxosmithkline, LLC. | $147.89 | 12 |
| Novo Nordisk Inc | $94.66 | 6 |
| Pfizer Inc. | $56.57 | 3 |
| Astrazeneca Pharmaceuticals LP | $54.52 | 3 |
What the 2025 payments were for
- Food and Beverage$788.78 · 55 payments
- Education$18.85 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 22 internal medicine physicians in Oak Ridge · All internal medicine physicians in Tennessee