Quick answers
- Which hospitals does John E. Williamson Jr. work at?
- Medicare's official clinician data lists John E. Williamson Jr. at 2 hospitals: Morris Hospital & Healthcare Centers and Sarah Bush Lincoln Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John E. Williamson Jr. see patients?
- Medicare's clinician data lists 2 practice locations, including Mattoon, IL and Morris, IL. Call before your visit to confirm the address.
- What is John E. Williamson Jr.'s specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does John E. Williamson Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John E. Williamson Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for John E. Williamson Jr.?
- (217) 258-2525, as listed in official Medicare / NPI Registry data.
- What is John E. Williamson Jr.'s NPI number?
- 1629017108. 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 E. Williamson Jr. works
Medicare's Facility Affiliation Data lists John E. Williamson Jr. at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Morris Hospital & Healthcare CentersMorris, IL · Acute Care Hospital · CCN 140101
- Sarah Bush Lincoln Health CenterMattoon, IL · Acute Care Hospital · CCN 140189
Practice locations
Addresses where John E. Williamson Jr. is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Health Ctr DrMattoon, IL 61938 (217) 258‑2525
- 150 W High StMorris, IL 60450 (815) 942‑2129
Group practices
Medicare enrollment lists John E. Williamson Jr. as a member of these groups (CMS data updated 2026-10-02).
- Sarah Bush Lincoln Health Center419 clinicians in the group
- Epic Group-Emergency Physicians An Illinois Concern SC10 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Mattoon
Clinicians with the same Medicare primary specialty in Mattoon, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1995 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1629017108 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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