John David Williams, M.D.
NPI 1528068426ActiveIndividual· Internal Medicine· Stillwater, OK
Internal Medicine (M.D.) in Stillwater, Oklahoma, trained at University of Oklahoma College of Medicine (class of 1981). Their prescriptions cost Medicare Part D more than their services did: $809,108 for 9,611 claims, against $165,393 paid for services in 2024. Amgen Inc. was the largest of 7 companies reporting payments in 2025, $429.96 in all, mostly food and beverage.
Overview
| NPI | 1528068426 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 21, 2005 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 13127 | 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 - Internal Medicine (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 418 |
|---|---|
| Services billed | 11,047 across 77 procedure codes |
| Paid by Medicare | $165,393 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,611 · 18,266 30-day fills |
|---|---|
| Patients | 328 |
| Total drug cost | $809,108 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | University of Oklahoma College of Medicine |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Hospital affiliations
- Norman RegionalNorman, OK
- Stillwater Medical CenterStillwater, OK
Other facilities
- Carter Healthcare of Central Oklahoma, LLCHome health agency · Oklahoma City, OK
- Companion Home Health, LLCHome health agency · Guthrie, OK
- Complete Home Health of Western OklahomaHome health agency · Tulsa, OK
- Stillwater Medical at HomeHome health agency · Stillwater, OK
Industry payments (Open Payments)
- 2025$429.96 · 15 payments from 7 companies
- 2024$325.30 · 18 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $163.11 | 4 |
| Optinose US, Inc. | $89.00 | 1 |
| Lilly USA, LLC | $60.31 | 4 |
| Medtronic, Inc. | $42.26 | 2 |
| Boston Scientific Corporation | $35.75 | 2 |
What the 2025 payments were for
- Food and Beverage$429.96 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 33 internal medicine physicians in Stillwater · All internal medicine physicians in Oklahoma