James Whittenburg Walker Jr., MD
NPI 1144205568ActiveIndividual· Internal Medicine· Amarillo, TX
Internal Medicine (MD) in Amarillo, Texas, trained at University of Texas Southwestern Medical School at Dallas (class of 1990). Their prescriptions cost Medicare Part D more than their services did: $269,810 for 2,166 claims, against $36,341 paid for services in 2024. Novo Nordisk Inc reported $21.85 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1144205568 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 8, 2005 |
| Last updated in NPPES | Jun 2, 2025 |
| Certified by provider | Jun 2, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | H9584 | TX |
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 (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 210 |
|---|---|
| Services billed | 534 across 30 procedure codes |
| Paid by Medicare | $36,341 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,166 · 4,346 30-day fills |
|---|---|
| Patients | 165 |
| Total drug cost | $269,810 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | University of Texas Southwestern Medical School at Dallas |
|---|---|
| Graduation year | 1990 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Texas Tech University Health Sciences Center AmarilloAmarillo, TX · 76 clinicians
Hospital affiliations
- Bsa HospitalAmarillo, TX
- Northwest Texas HospitalAmarillo, TX
Other facilities
- Enhabit HospiceHospice · Amarillo, TX
Industry payments (Open Payments)
- 2025$21.85 · 1 payment from 1 company
- 2024$151.86 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $21.85 | 1 |
What the 2025 payments were for
- Food and Beverage$21.85 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 105 internal medicine physicians in Amarillo · All internal medicine physicians in Texas