Quick answers
- Which hospitals does Peter Demartino work at?
- Medicare's official clinician data lists Peter Demartino at 3 hospitals: Emerson Hospital -, Lahey Hospital & Medical Center, Burlington and Massachusetts Eye and Ear Infirmary -. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Peter Demartino see patients?
- Medicare's clinician data lists 1 practice location in Acton, MA. Call before your visit to confirm the address.
- What is Peter Demartino's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Peter Demartino accept Medicare assignment?
- Yes. Medicare's clinician data says Peter Demartino 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 Peter Demartino?
- (978) 635-8700, as listed in official Medicare / NPI Registry data.
- What is Peter Demartino's NPI number?
- 1043292360. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Peter Demartino works
Medicare's Facility Affiliation Data lists Peter Demartino at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Emerson Hospital -W Concord, MA · Acute Care Hospital · CCN 220084
- Lahey Hospital & Medical Center, BurlingtonBurlington, MA · Acute Care Hospital · CCN 220171
- Massachusetts Eye and Ear Infirmary -Boston, MA · Acute Care Hospital · CCN 220075
Practice locations
Addresses where Peter Demartino is enrolled with Medicare (CMS data updated 2026-10-02).
- 321 Main StActon, MA 01720 (978) 635‑8700
Group practices
Medicare enrollment lists Peter Demartino as a member of this group (CMS data updated 2026-10-02).
- Acton Medical Associates PC34 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in Acton
Clinicians with the same Medicare primary specialty in Acton, MA — not a recommendation.
Clinician information
| Medical school | Georgetown University School Of Medicine |
|---|---|
| Graduation year | 1990 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1043292360 |
| 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