Quick answers
- Which hospitals does Steven D. Tiernan work at?
- Medicare's official clinician data lists Steven D. Tiernan at 5 hospitals: Carthage Area Hospital, Inc, Carthage Area Hospital, Inc, Lewis County General Hospital, River Hospital Clinics and Samaritan Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Steven D. Tiernan see patients?
- Medicare's clinician data lists 4 practice locations, including Adams, NY, Watertown, NY and Clayton, NY. Call before your visit to confirm the address.
- What is Steven D. Tiernan's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does Steven D. Tiernan accept Medicare assignment?
- Yes. Medicare's clinician data says Steven D. Tiernan 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.
- Does Steven D. Tiernan offer telehealth?
- Medicare's clinician data says Steven D. Tiernan offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Steven D. Tiernan?
- (315) 232-4400, as listed in official Medicare / NPI Registry data.
- What is Steven D. Tiernan's NPI number?
- 1437191277. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Steven D. Tiernan works
Medicare's Facility Affiliation Data lists Steven D. Tiernan at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Carthage Area Hospital, IncCarthage, NY · Critical Access Hospital · CCN 331318
- Carthage Area Hospital, IncOgdensburg, NY · Critical Access Hospital · CCN 331324
- Lewis County General HospitalLowville, NY · Critical Access Hospital · CCN 331317
- River Hospital ClinicsAlexandria Bay, NY · Critical Access Hospital · CCN 331309
- Samaritan Medical CenterWatertown, NY · Acute Care Hospital · CCN 330157
Practice locations
Addresses where Steven D. Tiernan is enrolled with Medicare (CMS data updated 2026-10-02).
- 10881 US Route 11Adams, NY 13605 (315) 232‑4400
- 165 Coleman AveWatertown, NY 13601 (315) 755‑2024
- 22567 Summit Dr, Bldg 2Watertown, NY 13601 (315) 785‑7230
- 909 Strawberry LnClayton, NY 13624 (315) 656‑2094
Group practices
Medicare enrollment lists Steven D. Tiernan as a member of this group (CMS data updated 2026-10-02).
- Samaritan Medical Center153 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Adams
Clinicians with the same Medicare primary specialty in Adams, NY — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1437191277 |
| 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