Quick answers
- Where does Hannah Griswold see patients?
- Medicare's clinician data lists 2 practice locations, including Somerville, MA and Charlestown, MA. Call before your visit to confirm the address.
- What is Hannah Griswold's specialty?
- Medicare lists Nurse Practitioner as the primary specialty.
- Does Hannah Griswold accept Medicare assignment?
- Medicare's clinician data says Hannah Griswold may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is Hannah Griswold's NPI number?
- 1497533988. 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 Hannah Griswold is enrolled with Medicare (CMS data updated 2026-10-02).
- 399 Revolution Dr, Suite 580Somerville, MA 02145
- 62 13th StCharlestown, MA 02129
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Somerville
Clinicians with the same Medicare primary specialty in Somerville, MA — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1497533988 |
| 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