Quick answers
- Which hospitals does Marissa A. Lazor work at?
- Medicare's official clinician data lists Marissa A. Lazor at 1 hospital: New England Baptist Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Marissa A. Lazor see patients?
- Medicare's clinician data lists 2 practice locations, including Boston, MA and Dedham, MA. Call before your visit to confirm the address.
- What is Marissa A. Lazor's specialty?
- Medicare lists Anesthesiology as the primary specialty.
- Does Marissa A. Lazor accept Medicare assignment?
- Yes. Medicare's clinician data says Marissa A. Lazor 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 Marissa A. Lazor?
- (781) 453-7300, as listed in official Medicare / NPI Registry data.
- What is Marissa A. Lazor's NPI number?
- 1790760759. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Marissa A. Lazor works
Medicare's Facility Affiliation Data lists Marissa A. Lazor at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- New England Baptist HospitalBoston, MA · Acute Care Hospital · CCN 220088
Practice locations
Addresses where Marissa A. Lazor is enrolled with Medicare (CMS data updated 2026-10-02).
- 125 Parker Hill AveBoston, MA 02120 (781) 453‑7300
- 40 Allied DrDedham, MA 02026 (617) 865‑1110
Group practices
Medicare enrollment lists Marissa A. Lazor as a member of these groups (CMS data updated 2026-10-02).
- Associated Physicians of Harvard Medical Faculty Physicians at Beth Is565 clinicians in the group
- Excel Anesthesia Associates PLLC30 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Northwestern University Feinberg Medical School |
| Graduation year | 1988 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1790760759 |
| 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