Quick answers
- Which hospitals does Mark E. McAllister work at?
- Medicare's official clinician data lists Mark E. McAllister at 1 hospital: MaineHealth Pen Bay Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark E. McAllister see patients?
- Medicare's clinician data lists 2 practice locations, including Portland, ME and Rockport, ME. Call before your visit to confirm the address.
- What is Mark E. McAllister's specialty?
- Medicare lists Family Practice as the primary specialty, and also Emergency Medicine.
- Does Mark E. McAllister accept Medicare assignment?
- Yes. Medicare's clinician data says Mark E. McAllister 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 Mark E. McAllister's NPI number?
- 1386844157. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark E. McAllister works
Medicare's Facility Affiliation Data lists Mark E. McAllister at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- MaineHealth Pen Bay HospitalRockport, ME · Acute Care Hospital · CCN 200063
Practice locations
Addresses where Mark E. McAllister is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 Bramhall StPortland, ME 04102
- 6 Glen Cove DrRockport, ME 04856
Group practices
Medicare enrollment lists Mark E. McAllister as a member of this group (CMS data updated 2026-10-02).
- MaineHealth2,633 clinicians in the group
Specialties
- Family Practiceprimary
- Emergency Medicinealso
Other family doctors in Portland
Clinicians with the same Medicare primary specialty in Portland, ME — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Geisel School Of Medicine At Dartmouth |
| Graduation year | 2007 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386844157 |
| 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