Quick answers
- Which hospitals does John Clark work at?
- Medicare's official clinician data lists John Clark at 3 hospitals: MaineHealth Maine Medical Center, MaineHealth Pen Bay Hospital and MaineHealth Waldo Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does John Clark see patients?
- Medicare's clinician data lists 3 practice locations, including Portland, ME and Rockport, ME. Call before your visit to confirm the address.
- What is John Clark's specialty?
- Medicare lists Physician Assistant as the primary specialty.
- Does John Clark accept Medicare assignment?
- Yes. Medicare's clinician data says John Clark 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 John Clark?
- (207) 921-5454, as listed in official Medicare / NPI Registry data.
- What is John Clark's NPI number?
- 1841228889. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where John Clark works
Medicare's Facility Affiliation Data lists John Clark 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
- MaineHealth Pen Bay HospitalRockport, ME · Acute Care Hospital · CCN 200063
- MaineHealth Waldo HospitalBelfast, ME · Critical Access Hospital · CCN 201312
Practice locations
Addresses where John Clark is enrolled with Medicare (CMS data updated 2026-10-02).
- 22 Bramhall StPortland, ME 04102
- 4 Glen Cove Dr, Suite 206Rockport, ME 04856 (207) 921‑5454
- 6 Glen Cove DrRockport, ME 04856
Group practices
Medicare enrollment lists John Clark as a member of this group (CMS data updated 2026-10-02).
- MaineHealth2,633 clinicians in the group
Specialties
- Physician Assistantprimary
Other physician assistants in Portland
Clinicians with the same Medicare primary specialty in Portland, ME — not a recommendation.
Clinician information
| Credential | PA |
|---|---|
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1841228889 |
| 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