Quick answers
- Which hospitals does Cashel O'Brien work at?
- Medicare's official clinician data lists Cashel O'Brien at 1 hospital: MaineHealth Maine Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Cashel O'Brien see patients?
- Medicare's clinician data lists 1 practice location in Portland, ME. Call before your visit to confirm the address.
- What is Cashel O'Brien's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does Cashel O'Brien accept Medicare assignment?
- Yes. Medicare's clinician data says Cashel O'Brien accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Cashel O'Brien?
- (207) 706-3280, as listed in official Medicare / NPI Registry data.
- What is Cashel O'Brien's NPI number?
- 1093275612. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Cashel O'Brien works
Medicare's Facility Affiliation Data lists Cashel O'Brien at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MaineHealth Maine Medical CenterPortland, ME · Acute Care Hospital · CCN 200009
Practice locations
Addresses where Cashel O'Brien is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 Bramhall StPortland, ME 04102 (207) 706‑3280
Group practices
Medicare enrollment lists Cashel O'Brien as a member of this group (CMS data updated 2026-10-02).
- MaineHealth2,633 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Maine →
Other cardiologists in Portland
Clinicians with the same Medicare primary specialty in Portland, ME — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | University Of New England, College Of Osteo Medicine |
| Graduation year | 2019 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1093275612 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians