Quick answers
- Does Sidney D. Williams Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says Sidney D. Williams Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Sidney D. Williams Jr. see?
- In 2024, CMS data shows 141 Original Medicare patients and 2,686 services for Sidney D. Williams Jr.. This counts Original Medicare only and measures volume, not quality.
- What is Sidney D. Williams Jr.'s NPI number?
- 1770507931. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Sidney D. Williams Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 141 |
|---|---|
| Services billed to Medicare | 2,686 |
| Different services or procedures | 19 |
| Participating Medicare provider | Yes |
| Average age of these patients | 69 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)1,375 services
- Testing for presence of drug, read by direct observation (80305)1,239 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- Arthritis75%
- High blood pressure70%
- High cholesterol49%
- Diabetes33%
- Ischemic heart disease29%
- Chronic kidney disease26%
Practice locations
Addresses where Sidney D. Williams Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 801 S Washington StStillwater, OK 74074
Specialties
- Pain Managementprimary
Other pain management doctors in Oklahoma
Clinicians with the same Medicare primary specialty in Oklahoma — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Oklahoma College Of Medicine |
| Graduation year | 1971 (55 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1770507931 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians