Quick answers
- Does John R. Williams Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John R. 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.
- What is John R. Williams Jr.'s NPI number?
- 1134217169. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John R. Williams Jr. works
Medicare's Facility Affiliation Data lists John R. Williams Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Pinckneyville Community HospitalPinckneyville, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141307
Practice locations
Addresses where John R. Williams Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 5383 State Route 154Pinckneyville, IL 62274
Group practices
Medicare enrollment lists John R. Williams Jr. as a member of this group (CMS data updated October 2, 2026).
- Pinckneyville Community Hospital27 clinicians in the group
Specialties
- Emergency Medicineprimary
- General Surgeryalso
Other emergency medicine doctors in Illinois
Clinicians with the same Medicare primary specialty in Illinois — not a recommendation.
Other clinicians in Pinckneyville Community Hospital
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Js Weill Medical College, Cornell University |
| Graduation year | 1989 (37 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134217169 |
| 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
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- 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