Quick answers
- Which hospitals does Greg S. Keller work at?
- Medicare's official clinician data lists Greg S. Keller at 1 hospital: Lewis County General Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Greg S. Keller see patients?
- Medicare's clinician data lists 1 practice location in Lowville, NY. Call before your visit to confirm the address.
- What is Greg S. Keller's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty.
- Does Greg S. Keller accept Medicare assignment?
- Yes. Medicare's clinician data says Greg S. Keller 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 Greg S. Keller?
- (315) 376-4505, as listed in official Medicare / NPI Registry data.
- What is Greg S. Keller's NPI number?
- 1639284813. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Greg S. Keller works
Medicare's Facility Affiliation Data lists Greg S. Keller at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Lewis County General HospitalLowville, NY · Critical Access Hospital · CCN 331317
Practice locations
Addresses where Greg S. Keller is enrolled with Medicare (CMS data updated 2026-10-02).
- 7785 N State St, Suite 120Lowville, NY 13367 (315) 376‑4505
Group practices
Medicare enrollment lists Greg S. Keller as a member of this group (CMS data updated 2026-10-02).
- Lewis County General Hospital40 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Pennsylvania State University College Of Medicine |
| Graduation year | 1994 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1639284813 |
| 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