Quick answers
- Which hospitals does William Ellison work at?
- Medicare's official clinician data lists William Ellison at 4 hospitals: Pelham Medical Center, Prisma Health Greer Memorial Hospital, Prisma Health Patewood Hospital and Spartanburg Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Ellison see patients?
- Medicare's clinician data lists 1 practice location in Greer, SC. Call before your visit to confirm the address.
- What is William Ellison's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does William Ellison accept Medicare assignment?
- Yes. Medicare's clinician data says William Ellison 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 William Ellison?
- (864) 879-7556, as listed in official Medicare / NPI Registry data.
- What is William Ellison's NPI number?
- 1548338197. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where William Ellison works
Medicare's Facility Affiliation Data lists William Ellison at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Pelham Medical CenterGreer, SC · Acute Care Hospital · CCN 420103
- Prisma Health Greer Memorial HospitalGreer, SC · Acute Care Hospital · CCN 420033
- Prisma Health Patewood HospitalGreenville, SC · Acute Care Hospital · CCN 420102
- Spartanburg Medical CenterSpartanburg, SC · Acute Care Hospital · CCN 420007
Practice locations
Addresses where William Ellison is enrolled with Medicare (CMS data updated 2026-10-02).
- 2755s Hwy 14 1210Greer, SC 29650 (864) 879‑7556
Group practices
Medicare enrollment lists William Ellison as a member of this group (CMS data updated 2026-10-02).
- Spartanburg Medical Center1,078 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Greer
Clinicians with the same Medicare primary specialty in Greer, SC — not a recommendation.
Clinician information
| Medical school | Medical University Of South Carolina College Of Medicine |
|---|---|
| Graduation year | 1977 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548338197 |
| 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