Kathleen Irene O'Brien, P.A.-C
NPI 1942597661ActiveIndividual· Physician Assistant· Topsham, ME
Opted out of Medicare from October 2024 to October 2028. Physician Assistant (P.A.-C) in Topsham, Maine, licensed in ME, with an NPI issued in July 2011. Their prescriptions cost Medicare Part D more than their services did: $51,691 for 908 claims, against $4,748 paid for services in 2024. Regeneron Healthcare Solutions, Inc. reported $31.54 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1942597661 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | P.A.-C |
| Sole proprietor | No |
| NPI issued | Jul 1, 2011 |
| Last updated in NPPES | Aug 24, 2023 |
| Certified by provider | Aug 24, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Physician Assistant Primary | 363A00000X | PA1272 | ME |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Oct 3, 2024 – Oct 3, 2028 |
| Can order and refer | Yes |
| Accepts assignment | Yes (participating) |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Medicare services in 2024
| Medicare patients | 86 |
|---|---|
| Services billed | 112 across 7 procedure codes |
| Paid by Medicare | $4,748 |
Part D prescriptions in 2024
| Prescriptions (claims) | 908 · 2,038 30-day fills |
|---|---|
| Patients | 247 |
| Total drug cost | $51,691 |
| Generic share | 90% of claims |
Industry payments (Open Payments)
- 2025$31.54 · 1 payment from 1 company
- 2024$23.13 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $31.54 | 1 |
What the 2025 payments were for
- Food and Beverage$31.54 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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