Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Troy A Demasters, PA
Physician Assistant in Weymouth, MA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1427048891
See something wrong? Report a correction
Registry record
Entity type Individual (Type 1)
Name Troy A Demasters
Credential PA
Sex Male
Practice address 55 Fogg Rd, Weymouth, MA, 02190
Phone (781) 624-8000
Fax (208) 367-7092
Enumeration date Oct 26, 2005
Last updated in NPPES Apr 24, 2026
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 3777 (AZ) Secondary
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA100230 (MA) Primary
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA363 (ID) Secondary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA credential
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.
Frequently asked questions
Where does Troy Demasters practice?
The practice location on file with NPPES is in Weymouth, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Troy Demasters?
The National Provider Identifier (NPI) for Troy Demasters is 1427048891, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all → Joseph Lenehan Plastic and Reconstructive Surgery Physician · South Weymouth, MA NPI 1699773135 Joseph M. Lenehan MD PC Plastic and Reconstructive Surgery Physician · South Weymouth, MA NPI 1750389664 Michael Ennis Certified Registered Nurse Anesthetist · Weymouth, MA NPI 1346241288 Richard Mirel Endocrinology, Diabetes & Metabolism Physician · Weymouth, MA NPI 1437150174 Matthew Weiss Critical Care Medicine (Internal Medicine) Physician · South Weymouth, MA NPI 1205829967 Michael Hayes Neurology Physician · South Weymouth, MA NPI 1689663338 Clifford Breslow Anesthesiology Physician · South Weymouth, MA NPI 1639169758 Richard Bello Anesthesiology Physician · South Weymouth, MA NPI 1285624312
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-04-24.