Marissa McCarron, PA
NPI 1689804593ActiveIndividual· Physician Assistant· Islandia, NY
Physician Assistant (PA) with Samaritan Medical Services PC, practicing in Islandia, New York. Their prescriptions cost Medicare Part D more than their services did: $156,412 for 1,403 claims, against $12,191 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 5 companies reporting payments in 2025, $236.53 in all, mostly food and beverage. Lists St Charles Hospital as a hospital affiliation.
Overview
| NPI | 1689804593 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PA |
| Sole proprietor | No |
| NPI issued | Jul 27, 2009 |
| Last updated in NPPES | Mar 26, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | — | — |
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 | 214 |
|---|---|
| Services billed | 249 across 13 procedure codes |
| Paid by Medicare | $12,191 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,403 · 1,508 30-day fills |
|---|---|
| Patients | 282 |
| Total drug cost | $156,412 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2009 |
|---|---|
| Medicare specialty | Physician Assistant |
Medical group
- Samaritan Medical Services PCWest Islip, NY · 354 clinicians
Hospital affiliation
- St Charles HospitalPort Jefferson, NY
Industry payments (Open Payments)
- 2025$236.53 · 10 payments from 5 companies
- 2024$81.19 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $84.19 | 4 |
| Vertex Pharmaceuticals Incorporated | $65.27 | 2 |
| Abbvie Inc. | $49.53 | 2 |
| Pfizer Inc. | $22.15 | 1 |
| Smith+nephew, Inc. | $15.39 | 1 |
What the 2025 payments were for
- Food and Beverage$236.53 · 10 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other physician assistants in Islandia
- 1386668457
- 1295643997
- 1174431316
- 1669563136
- 1306587175