Christian D. Clark, MD
NPI 1649223710ActiveIndividual· Internal Medicine, Gastroenterology· Tulsa, OK
Internal Medicine, Gastroenterology (MD) in Tulsa, Oklahoma, trained at University of Kansas School of Med (Kc/Wich/Sal) (class of 2003). In 2024 Medicare paid $201,756 for 694 patients, and Part D covered 519 of their prescriptions, 48% of them generic. Pfizer Inc. was the largest of 9 companies reporting payments in 2025, $590.19 in all, mostly food and beverage.
Overview
| NPI | 1649223710 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 18, 2006 |
| Last updated in NPPES | Mar 29, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 27511 | OK |
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 - Gastroenterology (OK); Practitioner - Gastroenterology (SC); Practitioner - Internal Medicine (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 694 |
|---|---|
| Services billed | 5,277 across 44 procedure codes |
| Paid by Medicare | $201,756 |
Part D prescriptions in 2024
| Prescriptions (claims) | 519 · 694 30-day fills |
|---|---|
| Patients | 358 |
| Total drug cost | $79,502 |
| Generic share | 48% of claims |
Education and affiliations
| Medical school | University of Kansas School of Med (Kc/Wich/Sal) |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical groups
- University Medical Associates of the Medical University of South CarolCharleston, SC · 1,668 clinicians
- Cherokee NationTahlequah, OK · 449 clinicians
- Creek Nation Hospital and ClinicsOkmulgee, OK · 365 clinicians
- Adult Gastroenterology Associates IncBartlesville, OK · 15 clinicians
Hospital affiliations
- Bailey Medical Center, LLCOwasso, OK
- Musc Medical CenterCharleston, SC
- Oklahoma Surgical Hospital, LLCTulsa, OK
- Saint Francis Hospital Vinita, IncVinita, OK
- Saint Francis Hospital, IncTulsa, OK
Industry payments (Open Payments)
- 2025$590.19 · 28 payments from 9 companies
- 2024$643.53 · 39 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $208.48 | 10 |
| Abbvie Inc. | $105.80 | 6 |
| Regeneron Healthcare Solutions, Inc. | $78.54 | 3 |
| Lilly USA, LLC | $70.18 | 3 |
| Takeda Pharmaceuticals U.S.A., Inc. | $35.29 | 2 |
What the 2025 payments were for
- Food and Beverage$590.19 · 28 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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