Steven D. Tiernan, PA
NPI 1437191277ActiveIndividual· Physician Assistant· Watertown, NY
Physician Assistant (PA) with Samaritan Medical Center, practicing in Watertown, New York. Their prescriptions cost Medicare Part D more than their services did: $352,075 for 3,587 claims, against $28,386 paid for services in 2024. Janssen Biotech, Inc. was the largest of 17 companies reporting payments in 2025, $936.06 in all, mostly food and beverage. Lists Carthage Area Hospital, Inc and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1437191277 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Jun 12, 2006 |
| Last updated in NPPES | Aug 31, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | 009062 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Physician Assistant (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 463 |
|---|---|
| Services billed | 732 across 16 procedure codes |
| Paid by Medicare | $28,386 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,587 · 6,134 30-day fills |
|---|---|
| Patients | 731 |
| Total drug cost | $352,075 |
| Generic share | 89% of claims |
Education and affiliations
| Graduation year | 2002 |
|---|---|
| Medicare specialty | Physician Assistant |
| Telehealth | Offers telehealth |
Medical group
- Samaritan Medical CenterWatertown, NY · 153 clinicians
Hospital affiliations
- Carthage Area Hospital, IncCarthage, NY
- Carthage Area Hospital, IncOgdensburg, NY
- Lewis County General HospitalLowville, NY
- River Hospital ClinicsAlexandria Bay, NY
- Samaritan Medical CenterWatertown, NY
Other facilities
- Jefferson Co Pub Hlth Svs ChhaHome health agency · Watertown, NY
Industry payments (Open Payments)
- 2025$936.06 · 38 payments from 17 companies
- 2024$1,195 · 52 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $152.97 | 7 |
| Astellas Pharma US Inc | $139.23 | 3 |
| Endo USA, Inc. | $122.09 | 5 |
| 180 Medical, Inc. | $101.13 | 4 |
| Boston Scientific Corporation | $54.04 | 2 |
What the 2025 payments were for
- Food and Beverage$837.06 · 37 payments
- Education$99.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 47 physician assistants in Watertown · All physician assistants in New York