Robert Lee Knox Jr., M.D.
NPI 1457349425ActiveIndividual· Internal Medicine, Gastroenterology· Murfreesboro, TN
Internal Medicine, Gastroenterology (M.D.) in Murfreesboro, Tennessee, trained at University of Tennessee, Hsc, College of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $888,867 for 1,293 claims, against $319,095 paid for services in 2024. Abbvie Inc. was the largest of 23 companies reporting payments in 2025, $2,810 in all, mostly food and beverage.
Overview
| NPI | 1457349425 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 12, 2005 |
| Last updated in NPPES | Jun 26, 2020 |
| Certified by provider | Jun 26, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 20879 | 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 - Gastroenterology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 529 |
|---|---|
| Services billed | 14,975 across 57 procedure codes |
| Paid by Medicare | $319,095 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,293 · 2,331 30-day fills |
|---|---|
| Patients | 303 |
| Total drug cost | $888,867 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | University of Tennessee, Hsc, College of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Gastroenterology |
Medical group
- Murfreesboro Medical Clinic, P.A.Murfreesboro, TN · 182 clinicians
Industry payments (Open Payments)
- 2025$2,810 · 118 payments from 23 companies
- 2024$3,115 · 155 payments from 24 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $595.59 | 29 |
| Takeda Pharmaceuticals U.S.A., Inc. | $336.07 | 19 |
| Lilly USA, LLC | $334.21 | 10 |
| Janssen Biotech, Inc. | $231.37 | 7 |
| Genzyme Corporation | $213.22 | 6 |
What the 2025 payments were for
- Food and Beverage$2,711 · 117 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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