Clinton Graves Wallis, M.D.
NPI 1255384483ActiveIndividual· Internal Medicine, Gastroenterology· Oklahoma City, OK
Internal Medicine, Gastroenterology (M.D.) with Hpi Physicians LLC, practicing in Oklahoma City, Oklahoma. Their prescriptions cost Medicare Part D more than their services did: $320,443 for 1,168 claims, against $112,349 paid for services in 2024. Janssen Biotech, Inc. was the largest of 5 companies reporting payments in 2025, $308.75 in all, mostly food and beverage. Lists Community Hospital, LLC and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1255384483 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 18, 2006 |
| Last updated in NPPES | Feb 17, 2025 |
| Certified by provider | Feb 17, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 24646 | OK |
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 (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 617 |
|---|---|
| Services billed | 1,016 across 26 procedure codes |
| Paid by Medicare | $112,349 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,168 · 1,993 30-day fills |
|---|---|
| Patients | 381 |
| Total drug cost | $320,443 |
| Generic share | 91% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Hpi Physicians LLCOklahoma City, OK · 48 clinicians
Hospital affiliations
- Community Hospital, LLCOklahoma City, OK
- Integris Baptist Medical Center, IncOklahoma City, OK
- Integris Health Edmond HospitalEdmond, OK
- Ssm Health St Anthony Hospital - Oklahoma CityOklahoma City, OK
Industry payments (Open Payments)
- 2025$308.75 · 21 payments from 5 companies
- 2024$116.23 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $189.18 | 10 |
| Phathom Pharmaceuticals, Inc. | $41.51 | 8 |
| Boston Scientific Corporation | $33.91 | 1 |
| Echosens North America, Inc. | $27.15 | 1 |
| Abbvie Inc. | $17.00 | 1 |
What the 2025 payments were for
- Food and Beverage$223.76 · 20 payments
- Education$84.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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