Quick answers
- Where does Geoffrey S. Hirsowitz see patients?
- Medicare's clinician data lists 12 practice locations, including Dedham, MA, Needham, MA and Quincy, MA. Call before your visit to confirm the address.
- What is Geoffrey S. Hirsowitz's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Geoffrey S. Hirsowitz accept Medicare assignment?
- Yes. Medicare's clinician data says Geoffrey S. Hirsowitz 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 Geoffrey S. Hirsowitz?
- (781) 329-1400, as listed in official Medicare / NPI Registry data.
- What is Geoffrey S. Hirsowitz's NPI number?
- 1649299744. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Geoffrey S. Hirsowitz is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 12; the Medicare profile lists all.
- 1 Lyons StDedham, MA 02026 (781) 329‑1400
- 100 2nd AveNeedham, MA 02494 (781) 726‑4800
- 1250 Hancock StQuincy, MA 02169 (617) 740‑0600
- 133 Brookline AveBoston, MA 02215 (617) 421‑1000
- 142 Berkeley StBoston, MA 02116 (617) 859‑5000
Group practices
Medicare enrollment lists Geoffrey S. Hirsowitz as a member of this group (CMS data updated 2026-10-02).
- Atrius Health Inc1,222 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Massachusetts →
Other cardiologists in Dedham
Clinicians with the same Medicare primary specialty in Dedham, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 1975 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1649299744 |
| 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
- 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