Quick answers
- Which hospitals does Gregory Ganzer work at?
- Medicare's official clinician data lists Gregory Ganzer at 2 hospitals: Trinity Medical Ctr East &Trinity Medical Ctr West and Wheeling Hospital, Inc. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory Ganzer see patients?
- Medicare's clinician data lists 4 practice locations, including Wheeling, WV, Triadelphia, WV and Steubenville, OH. Call before your visit to confirm the address.
- What is Gregory Ganzer's specialty?
- Medicare lists Dermatology as the primary specialty.
- Does Gregory Ganzer accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory Ganzer 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 Gregory Ganzer?
- (304) 233-3240, as listed in official Medicare / NPI Registry data.
- What is Gregory Ganzer's NPI number?
- 1326163890. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gregory Ganzer works
Medicare's Facility Affiliation Data lists Gregory Ganzer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Trinity Medical Ctr East &Trinity Medical Ctr WestSteubenville, OH · Acute Care Hospital · CCN 360211
- Wheeling Hospital, IncWheeling, WV · Acute Care Hospital · CCN 510050
Practice locations
Addresses where Gregory Ganzer is enrolled with Medicare (CMS data updated 2026-10-02).
- 2101 Chapline StWheeling, WV 26003 (304) 233‑3240
- 300 Wharton Cir, Suite 180Triadelphia, WV 26059 (304) 547‑0007
- 4100 Johnson Rd, Suite 200Steubenville, OH 43952 (740) 266‑9823
- 899 E Iron AveDover, OH 44622 (330) 364‑4404
Group practices
Medicare enrollment lists Gregory Ganzer as a member of this group (CMS data updated 2026-10-02).
- Ganzer - Hahn Dermatology Associates, PLLC12 clinicians in the group
Specialties
- Dermatologyprimary
Other dermatologists in West Virginia
Clinicians with the same Medicare primary specialty in West Virginia — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Philadelphia College Of Osteopathic Medicine |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1326163890 |
| 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