Quick answers
- Which hospitals does Mark P. Altman work at?
- Medicare's official clinician data lists Mark P. Altman at 3 hospitals: Bridgeport Hospital, Greenwich Hospital Association - and Yale-New Haven Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark P. Altman see patients?
- Medicare's clinician data lists 10 practice locations, including Guilford, CT, New Haven, CT and Fairfield, CT. Call before your visit to confirm the address.
- What is Mark P. Altman's specialty?
- Medicare lists Orthopedic Surgery as the primary specialty, and also Hand Surgery.
- Does Mark P. Altman accept Medicare assignment?
- Yes. Medicare's clinician data says Mark P. Altman 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 P. Altman?
- (203) 785-4126, as listed in official Medicare / NPI Registry data.
- What is Mark P. Altman's NPI number?
- 1689652711. 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 P. Altman works
Medicare's Facility Affiliation Data lists Mark P. Altman at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bridgeport HospitalBridgeport, CT · Acute Care Hospital · CCN 070010
- Greenwich Hospital Association -Greenwich, CT · Acute Care Hospital · CCN 070018
- Yale-New Haven HospitalNew Haven, CT · Acute Care Hospital · CCN 070022
Practice locations
Addresses where Mark P. Altman is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 10; the Medicare profile lists all.
- 111 Goose LnGuilford, CT 06437 (203) 785‑4126
- 1450 Chapel StNew Haven, CT 06511
- 1931 Black Rock TpkeFairfield, CT 06825 (203) 384‑8681
- 300 Seaside AveMilford, CT 06460 (203) 301‑6261
- 300 Seaside Ave, Fl 2Milford, CT 06460 (203) 301‑6261
Group practices
Medicare enrollment lists Mark P. Altman as a member of these groups (CMS data updated 2026-10-02).
- Northeast Medical Group Inc1,360 clinicians in the group
- Rehabilitation Associates Inc529 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
- Hand Surgeryalso
Other orthopedic surgeons in Guilford
Clinicians with the same Medicare primary specialty in Guilford, CT — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Albert Einstein College Of Medicine Of Yeshiva University |
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1689652711 |
| 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