Quick answers
- Which hospitals does Gregory C. Treharne work at?
- Medicare's official clinician data lists Gregory C. Treharne at 4 hospitals: Geisinger Medical Center, Geisinger St. Luke's Hospital, Schuylkill Medical Center - South Jackson Street and St Luke's Miners Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory C. Treharne see patients?
- Medicare's clinician data lists 1 practice location in Pottsville, PA. Call before your visit to confirm the address.
- What is Gregory C. Treharne's specialty?
- Medicare lists Radiation Oncology as the primary specialty.
- Does Gregory C. Treharne accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory C. Treharne 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 C. Treharne?
- (570) 622-8500, as listed in official Medicare / NPI Registry data.
- What is Gregory C. Treharne's NPI number?
- 1972875763. 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 C. Treharne works
Medicare's Facility Affiliation Data lists Gregory C. Treharne at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Geisinger Medical CenterDanville, PA · Acute Care Hospital · CCN 390006
- Geisinger St. Luke's HospitalOrwigsburg, PA · Acute Care Hospital · CCN 390332
- Schuylkill Medical Center - South Jackson StreetPottsville, PA · Acute Care Hospital · CCN 390030
- St Luke's Miners Memorial HospitalCoaldale, PA · Acute Care Hospital · CCN 390183
Practice locations
Addresses where Gregory C. Treharne is enrolled with Medicare (CMS data updated 2026-10-02).
- 100 One Norwegian PlzPottsville, PA 17901 (570) 622‑8500
Group practices
Medicare enrollment lists Gregory C. Treharne as a member of this group (CMS data updated 2026-10-02).
- Geisinger Clinic3,467 clinicians in the group
Specialties
- Radiation Oncologyprimary
Other radiation oncologists in Pennsylvania
Clinicians with the same Medicare primary specialty in Pennsylvania — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tulane University School Of Medicine |
| Graduation year | 2010 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1972875763 |
| 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