Gary D. Roark, M.D.
NPI 1003896531ActiveIndividual· Specialist· Abilene, TX
Specialist (M.D.) with Gastroenterology Assoc, LLP, practicing in Abilene, Texas. In 2024 Medicare paid $120,253 for 671 patients, and Part D covered 1,304 of their prescriptions, 83% of them generic. Takeda Pharmaceuticals U.S.A., Inc. was the largest of 13 companies reporting payments in 2025, $1,472 in all, mostly food and beverage. Lists Hendrick Medical Center as a hospital affiliation.
Overview
| NPI | 1003896531 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 19, 2006 |
| Last updated in NPPES | Mar 24, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | E4638 | 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 - Gastroenterology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 671 |
|---|---|
| Services billed | 1,063 across 26 procedure codes |
| Paid by Medicare | $120,253 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,304 · 1,671 30-day fills |
|---|---|
| Patients | 691 |
| Total drug cost | $138,954 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1980 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Gastroenterology Assoc, LLPAbilene, TX · 4 clinicians
Hospital affiliation
- Hendrick Medical CenterAbilene, TX
Industry payments (Open Payments)
- 2025$1,472 · 74 payments from 13 companies
- 2024$1,129 · 65 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $381.52 | 14 |
| Abbvie Inc. | $277.72 | 17 |
| Janssen Biotech, Inc. | $191.69 | 9 |
| Regeneron Healthcare Solutions, Inc. | $163.77 | 7 |
| Madrigal Pharmaceuticals | $149.93 | 7 |
What the 2025 payments were for
- Food and Beverage$1,472 · 74 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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