Alexander Thomas O'Brien, PMHNP
NPI 1598420770ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Chestnut Hill, MA
Nurse Practitioner, Psych/Mental Health (PMHNP) in Chestnut Hill, Massachusetts, licensed in MA, with an NPI issued in November 2021. 39 Medicare patients in 2024, $27,774 paid; nearly all of their 456 Part D prescriptions were generic (96%). Janssen Biotech, Inc. reported $84.00 in payments in 2025, mostly education.
Overview
| NPI | 1598420770 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PMHNP |
| Sole proprietor | No |
| NPI issued | Nov 3, 2021 |
| Last updated in NPPES | Mar 13, 2023 |
| Certified by provider | Mar 13, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | 234518 | MA |
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 - Nurse Practitioner (MA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 39 |
|---|---|
| Services billed | 358 across 6 procedure codes |
| Paid by Medicare | $27,774 |
Part D prescriptions in 2024
| Prescriptions (claims) | 456 · 458 30-day fills |
|---|---|
| Patients | 68 |
| Total drug cost | $6,988 |
| Generic share | 96% of claims |
Industry payments (Open Payments)
- 2025$84.00 · 1 payment from 1 company
- 2024$22.47 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $84.00 | 1 |
What the 2025 payments were for
- Education$84.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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