Quick answers
- Which hospitals does Gregory A. Ruff work at?
- Medicare's official clinician data lists Gregory A. Ruff at 1 hospital: Mount Nittany Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gregory A. Ruff see patients?
- Medicare's clinician data lists 6 practice locations, including Bellefonte, PA and State College, PA. Call before your visit to confirm the address.
- What is Gregory A. Ruff's specialty?
- Medicare lists Pulmonary Disease as the primary specialty, and also Critical Care (Intensivists) and Sleep Medicine.
- Does Gregory A. Ruff accept Medicare assignment?
- Yes. Medicare's clinician data says Gregory A. Ruff 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 A. Ruff?
- (814) 355-3626, as listed in official Medicare / NPI Registry data.
- What is Gregory A. Ruff's NPI number?
- 1548249642. 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 A. Ruff works
Medicare's Facility Affiliation Data lists Gregory A. Ruff at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mount Nittany Medical CenterState College, PA · Acute Care Hospital · CCN 390268
Practice locations
Addresses where Gregory A. Ruff is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 129 Medical Park LnBellefonte, PA 16823 (814) 355‑3626
- 141 Medical Park LnBellefonte, PA 16823 (814) 355‑7322
- 143 Hospital DrState College, PA 16803
- 143 Hospital Dr, Suite 201State College, PA 16803 (814) 234‑8800
- 155 Wellness WayState College, PA 16803
Group practices
Medicare enrollment lists Gregory A. Ruff as a member of this group (CMS data updated 2026-10-02).
- Mount Nittany Medical Center Health Services Inc367 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Critical Care (Intensivists)also
- Sleep Medicinealso
Other pulmonologists in Bellefonte
Clinicians with the same Medicare primary specialty in Bellefonte, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Pennsylvania State University College Of Medicine |
| Graduation year | 1993 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1548249642 |
| 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