Sidney Dalton Williams Jr., M.D.
NPI 1770507931ActiveIndividual· Internal Medicine· Stillwater, OK
Internal Medicine (M.D.) in Stillwater, Oklahoma, trained at University of Oklahoma College of Medicine (class of 1971). Their prescriptions cost Medicare Part D more than their services did: $566,101 for 7,148 claims, against $127,429 paid for services in 2024. Collegium Pharmaceutical, Inc. reported $19.43 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1770507931 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jul 27, 2006 |
| Last updated in NPPES | Sep 12, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 9680 | 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 - Pain Management (OK) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 141 |
|---|---|
| Services billed | 2,686 across 19 procedure codes |
| Paid by Medicare | $127,429 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,148 · 9,959 30-day fills |
|---|---|
| Patients | 219 |
| Total drug cost | $566,101 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | University of Oklahoma College of Medicine |
|---|---|
| Graduation year | 1971 |
| Medicare specialty | Pain Management |
Industry payments (Open Payments)
- 2025$19.43 · 1 payment from 1 company
- 2024$13.82 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Collegium Pharmaceutical, Inc. | $19.43 | 1 |
What the 2025 payments were for
- Food and Beverage$19.43 · 1 payment
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