Quick answers
- Which hospitals does William Mercer work at?
- Medicare's official clinician data lists William Mercer at 1 hospital: Wheeling Hospital, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does William Mercer see patients?
- Medicare's clinician data lists 1 practice location in Wheeling, WV. Call before your visit to confirm the address.
- What is William Mercer's specialty?
- Medicare lists Family Practice as the primary specialty, and also Geriatric Medicine.
- Does William Mercer accept Medicare assignment?
- Yes. Medicare's clinician data says William Mercer 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 Mercer?
- (304) 234-2000, as listed in official Medicare / NPI Registry data.
- What is William Mercer's NPI number?
- 1780687558. 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 Mercer works
Medicare's Facility Affiliation Data lists William Mercer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Wheeling Hospital, IncWheeling, WV · Acute Care Hospital · CCN 510050
Practice locations
Addresses where William Mercer is enrolled with Medicare (CMS data updated 2026-10-02).
- 58 16th StWheeling, WV 26003 (304) 234‑2000
Group practices
Medicare enrollment lists William Mercer as a member of this group (CMS data updated 2026-10-02).
- Wheeling Hospital Inc444 clinicians in the group
Specialties
- Family Practiceprimary
- Geriatric Medicinealso
Other family doctors in Wheeling
Clinicians with the same Medicare primary specialty in Wheeling, WV — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | West Virginia University School Of Medicine |
| Graduation year | 1979 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1780687558 |
| 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