Gregory Walker, M.D., M.B.A.
NPI 1487074084ActiveIndividual· Dermatology· Waco, TX
Dermatology (M.D., M.B.A.) in Waco, Texas, trained at Texas Tech University Health Science Center School of Medicine (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $986,293 for 1,281 claims, against $500,009 paid for services in 2024. Regeneron Healthcare Solutions, Inc. was the largest of 21 companies reporting payments in 2025, $3,119 in all, mostly food and beverage.
Overview
| NPI | 1487074084 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., M.B.A. |
| Sole proprietor | No |
| NPI issued | Apr 22, 2014 |
| Last updated in NPPES | Aug 26, 2020 |
| Certified by provider | Aug 26, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | R5338 | TX |
| Dermatology | 207N00000X | BP20053749 | TX |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Dermatology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 773 |
|---|---|
| Services billed | 5,547 across 97 procedure codes |
| Paid by Medicare | $500,009 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,281 · 1,399 30-day fills |
|---|---|
| Patients | 517 |
| Total drug cost | $986,293 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | Texas Tech University Health Science Center School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Dermatology |
Medical group
- Oliver Street 5.01(A) IncCedar Park, TX · 168 clinicians
Industry payments (Open Payments)
- 2025$3,119 · 145 payments from 21 companies
- 2024$2,562 · 140 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $460.03 | 13 |
| Abbvie Inc. | $315.46 | 15 |
| Ucb, Inc. | $278.24 | 14 |
| Pfizer Inc. | $277.96 | 10 |
| Lilly USA, LLC | $263.82 | 13 |
What the 2025 payments were for
- Food and Beverage$3,109 · 144 payments
- Education$9.65 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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