Quick answers
- Which hospitals does Mark L. Henderson work at?
- Medicare's official clinician data lists Mark L. Henderson at 5 hospitals: Down East Community Hospital, Northern Light A R Gould Hospital, Northern Light Eastern Maine Medical Center, Northern Light Maine Coast Hospital and St Joseph Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark L. Henderson see patients?
- Medicare's clinician data lists 1 practice location in Bangor, ME. Call before your visit to confirm the address.
- What is Mark L. Henderson's specialty?
- Medicare lists Endocrinology as the primary specialty, and also Internal Medicine.
- Does Mark L. Henderson accept Medicare assignment?
- Yes. Medicare's clinician data says Mark L. Henderson 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 Mark L. Henderson?
- (207) 907-3300, as listed in official Medicare / NPI Registry data.
- What is Mark L. Henderson's NPI number?
- 1891895272. 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 L. Henderson works
Medicare's Facility Affiliation Data lists Mark L. Henderson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Down East Community HospitalMachias, ME · Critical Access Hospital · CCN 201311
- Northern Light A R Gould HospitalPresque Isle, ME · Acute Care Hospital · CCN 200018
- Northern Light Eastern Maine Medical CenterBangor, ME · Acute Care Hospital · CCN 200033
- Northern Light Maine Coast HospitalEllsworth, ME · Acute Care Hospital · CCN 200050
- St Joseph HospitalBangor, ME · Acute Care Hospital · CCN 200001
Practice locations
Addresses where Mark L. Henderson is enrolled with Medicare (CMS data updated 2026-10-02).
- 900 BroadwayBangor, ME 04401 (207) 907‑3300
Group practices
Medicare enrollment lists Mark L. Henderson as a member of this group (CMS data updated 2026-10-02).
- St Joseph Hospital199 clinicians in the group
Specialties
- Endocrinologyprimary
- Internal Medicinealso
Other endocrinologists in Maine
Clinicians with the same Medicare primary specialty in Maine — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Massachusetts Medical School |
| Graduation year | 1980 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1891895272 |
| 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