Quick answers
- Which hospitals does Marshall S. Katz work at?
- Medicare's official clinician data lists Marshall S. Katz at 3 hospitals: Beth Israel Deaconess Medical Center, Brigham and Women's Hospital and Newton-Wellesley Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marshall S. Katz see patients?
- Medicare's clinician data lists 1 practice location in Boston, MA. Call before your visit to confirm the address.
- What is Marshall S. Katz's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty.
- Does Marshall S. Katz accept Medicare assignment?
- Yes. Medicare's clinician data says Marshall S. Katz 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.
- Does Marshall S. Katz offer telehealth?
- Medicare's clinician data says Marshall S. Katz offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Marshall S. Katz?
- (617) 421-1000, as listed in official Medicare / NPI Registry data.
- What is Marshall S. Katz's NPI number?
- 1124024013. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marshall S. Katz works
Medicare's Facility Affiliation Data lists Marshall S. Katz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Beth Israel Deaconess Medical CenterBoston, MA · Acute Care Hospital · CCN 220086
- Brigham and Women's HospitalBoston, MA · Acute Care Hospital · CCN 220110
- Newton-Wellesley HospitalNewton, MA · Acute Care Hospital · CCN 220101
Practice locations
Addresses where Marshall S. Katz is enrolled with Medicare (CMS data updated 2026-10-02).
- 133 Brookline AveBoston, MA 02215 (617) 421‑1000
Group practices
Medicare enrollment lists Marshall S. Katz 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 Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Boston University School Of Medicine |
| Graduation year | 1991 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1124024013 |
| 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