Quick answers
- Where does Brian B. Guarnotta see patients?
- Medicare's clinician data lists 1 practice location in Boston, MA. Call before your visit to confirm the address.
- What is Brian B. Guarnotta's specialty?
- Medicare lists Pediatric Medicine as the primary specialty.
- Does Brian B. Guarnotta accept Medicare assignment?
- Yes. Medicare's clinician data says Brian B. Guarnotta 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 Brian B. Guarnotta?
- (617) 421-1000, as listed in official Medicare / NPI Registry data.
- What is Brian B. Guarnotta's NPI number?
- 1255319885. 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 Brian B. Guarnotta is enrolled with Medicare (CMS data updated 2026-10-02).
- 133 Brookline AveBoston, MA 02215 (617) 421‑1000
Group practices
Medicare enrollment lists Brian B. Guarnotta as a member of this group (CMS data updated 2026-10-02).
- Atrius Health Inc1,222 clinicians in the group
Specialties
- Pediatric Medicineprimary
Other pediatricians in Boston
Clinicians with the same Medicare primary specialty in Boston, MA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of South Carolina School Of Medicine |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1255319885 |
| 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