William Martin Schnitz, MD
NPI 1629015763ActiveIndividual· Internal Medicine, Rheumatology· Oklahoma City, OK
Internal Medicine, Rheumatology (MD) with Absentee Shawnee Tribal Health Authority, Inc and 2 other groups, practicing in Oklahoma City, Oklahoma. Their prescriptions cost Medicare Part D more than their services did: $4,804,621 for 3,987 claims, against $702,792 paid for services in 2024. Amgen Inc. was the largest of 16 companies reporting payments in 2025, $1,462 in all, mostly food and beverage. Lists Integris Baptist Medical Center, Inc and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1629015763 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | May 31, 2006 |
| Last updated in NPPES | Jul 20, 2026 |
| Certified by provider | Jul 20, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Rheumatology Primary | 207RR0500X | 16521 | OK |
| Internal Medicine | 207R00000X | 16521 | 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 - Rheumatology (OK); Practitioner - Rheumatology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 345 |
|---|---|
| Services billed | 72,510 across 61 procedure codes |
| Paid by Medicare | $702,792 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,987 · 7,586 30-day fills |
|---|---|
| Patients | 434 |
| Total drug cost | $4,804,621 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Rheumatology |
Medical groups
- Absentee Shawnee Tribal Health Authority, IncNorman, OK · 83 clinicians
- Central Oklahoma American Indian Health Council, Inc.Oklahoma City, OK · 59 clinicians
- Optimum Primary Care PLLCEdmond, OK · 14 clinicians
Hospital affiliations
- Integris Baptist Medical Center, IncOklahoma City, OK
- Integris Southwest Medical CenterOklahoma City, OK
- O U Medical CenterOklahoma City, OK
- Onecore HealthOklahoma City, OK
- Stillwater Medical CenterStillwater, OK
Industry payments (Open Payments)
- 2025$1,462 · 72 payments from 16 companies
- 2024$1,877 · 75 payments from 14 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $471.16 | 18 |
| Abbvie Inc. | $327.94 | 15 |
| Astrazeneca Pharmaceuticals LP | $166.90 | 12 |
| Ucb, Inc. | $152.20 | 8 |
| Fresenius Kabi USA, LLC | $77.92 | 4 |
What the 2025 payments were for
- Food and Beverage$1,462 · 72 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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