Quick answers
- Which hospitals does Sidney Olefson work at?
- Medicare's official clinician data lists Sidney Olefson at 5 hospitals: Albany Medical Center Hospital, Ellis Hospital, Glens Falls Hospital, Saint Anne's Hospital and Saratoga Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Sidney Olefson see patients?
- Medicare's clinician data lists 4 practice locations, including Saratoga Springs, NY, Fall River, MA and Burnt Hills, NY. Call before your visit to confirm the address.
- What is Sidney Olefson's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Sidney Olefson accept Medicare assignment?
- Yes. Medicare's clinician data says Sidney Olefson 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 Sidney Olefson?
- (518) 831-1500, as listed in official Medicare / NPI Registry data.
- What is Sidney Olefson's NPI number?
- 1457798506. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Sidney Olefson works
Medicare's Facility Affiliation Data lists Sidney Olefson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Albany Medical Center HospitalAlbany, NY · Acute Care Hospital · CCN 330013
- Ellis HospitalSchenectady, NY · Acute Care Hospital · CCN 330153
- Glens Falls HospitalGlens Falls, NY · Acute Care Hospital · CCN 330191
- Saint Anne's HospitalFall River, MA · Acute Care Hospital · CCN 220020
- Saratoga HospitalSaratoga Springs, NY · Acute Care Hospital · CCN 330222
Practice locations
Addresses where Sidney Olefson is enrolled with Medicare (CMS data updated 2026-10-02).
- 1 W Ave, Suite 130Saratoga Springs, NY 12866 (518) 831‑1500
- 277 Pleasant St, Suite 240Fall River, MA 02721 (508) 676‑3292
- 289 Pleasant St, Suite 501Fall River, MA 02721 (508) 679‑6611
- 848 State Route 50Burnt Hills, NY 12027
Group practices
Medicare enrollment lists Sidney Olefson as a member of these groups (CMS data updated 2026-10-02).
- Prima Care, PC220 clinicians in the group
- Saratoga Schenectady Gastroenterology Associates, PC31 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Saratoga Springs
Clinicians with the same Medicare primary specialty in Saratoga Springs, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albany Medical College Of Union University |
| Graduation year | 2013 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1457798506 |
| 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