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Firefly Medical Group PC

Internal Medicine Physician in Watertown, MA · enumerated 2018 · authorized official Jeffrey Greenberg, Vice President.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1225537533

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Registry record

Entity type Organization (Type 2)
Legal business name Firefly Medical Group PC
Practice address 260 Arsenal Pl, Watertown, MA, 02472
Phone (888) 897-1887
Fax (857) 343-8192
Enumeration date Feb 2, 2018
Last updated in NPPES Nov 26, 2024

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Jeffrey Greenberg
Title Vice President
Phone (781) 291-3042

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How current is this record?
Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2024-11-26. Verify at npiregistry.cms.hhs.gov.
Where is Firefly Medical Group PC located?
The practice location on file with NPPES is in Watertown, MA.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-11-26.