OrganizationActive
Firefly Medical Group PC
NPI 1164068458 · Internal Medicine Physician · Watertown, MA
Provider details
- NPI number
- 1164068458
- Entity type
- Organization
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Jeffrey Greenberg, Vice President(781) 291-3042
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Established profile(65/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
260 Arsenal Pl
Watertown, MA 02472-3171
Phone: (888) 897-1887
Fax: (857) 343-8192
Street-level locationGet directions
Mailing address
Po Box 211639
Eagan, MN 55121-3639
Other names (DBA / former)
- Doing business as
- Firefly-Atrius
- Doing business as
- Firefly-Atrius
Registry dates
- Enumerated
- 2019-11-21
- Last updated
- 2024-11-26
- Certified
- 2024-11-26
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.