Cashel O'Brien, DO
NPI 1093275612ActiveIndividual· Internal Medicine, Cardiovascular Disease· Portland, ME
Internal Medicine, Cardiovascular Disease (DO) in Portland, Maine, trained at University of New England, College of Osteo Medicine (class of 2019). Their prescriptions cost Medicare Part D more than their services did: $49,339 for 132 claims, against $1,383 paid for services in 2024.
Overview
| NPI | 1093275612 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Mar 20, 2019 |
| Last updated in NPPES | Jul 9, 2026 |
| Certified by provider | Jul 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | DO3386 | ME |
| Hospitalist | 208M00000X | DO3386 | ME |
| Internal Medicine, Adolescent Medicine | 207RA0000X | DO3386 | ME |
| Internal Medicine | 207R00000X | DO3386 | ME |
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 - Cardiovascular Disease (Cardiology) (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 18 |
|---|---|
| Services billed | 23 across 9 procedure codes |
| Paid by Medicare | $1,383 |
Part D prescriptions in 2024
| Prescriptions (claims) | 132 · 359 30-day fills |
|---|---|
| Patients | 26 |
| Total drug cost | $49,339 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | University of New England, College of Osteo Medicine |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Internal Medicine |
Medical group
- MainehealthPortland, ME · 2,633 clinicians
Hospital affiliation
- Mainehealth Maine Medical CenterPortland, ME
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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