Gaylon L. Harris, M.D.
NPI 1740258011ActiveIndividual· Internal Medicine· Columbia, TN
Internal Medicine (M.D.) in Columbia, Tennessee, trained at University of Tennessee, Hsc, College of Medicine (class of 1994). Their prescriptions cost Medicare Part D more than their services did: $1,312,167 for 13,004 claims, against $93,980 paid for services in 2024. Amgen Inc. was the largest of 16 companies reporting payments in 2025, $1,217 in all, mostly food and beverage.
Overview
| NPI | 1740258011 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 10, 2006 |
| Last updated in NPPES | Feb 3, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 21430 | 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 | 392 |
|---|---|
| Services billed | 2,125 across 36 procedure codes |
| Paid by Medicare | $93,980 |
Part D prescriptions in 2024
| Prescriptions (claims) | 13,004 · 32,051 30-day fills |
|---|---|
| Patients | 718 |
| Total drug cost | $1,312,167 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | University of Tennessee, Hsc, College of Medicine |
|---|---|
| Graduation year | 1994 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Williamson Medical Group, LLCNolensville, TN · 69 clinicians
Hospital affiliations
- Marshall Medical CenterLewisburg, TN
- Maury Regional HospitalColumbia, TN
- Williamson Medical CenterFranklin, TN
Other facilities
- Beacon Home HealthHome health agency · Smyrna, TN
- Maury Regional Home ServicesHome health agency · Columbia, TN
- Nhc Homecare of ColumbiaHome health agency · Columbia, TN
Industry payments (Open Payments)
- 2025$1,217 · 62 payments from 16 companies
- 2024$1,233 · 68 payments from 22 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $210.76 | 14 |
| Novo Nordisk Inc | $202.13 | 5 |
| Astrazeneca Pharmaceuticals LP | $190.46 | 14 |
| Novartis Pharmaceuticals Corporation | $129.41 | 4 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $73.05 | 5 |
What the 2025 payments were for
- Food and Beverage$1,217 · 62 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 44 internal medicine physicians in Columbia · All internal medicine physicians in Tennessee