NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thomas P. Mcmahon, MD

Gastroenterology Physician in Wareham, MA · enumerated 2006.

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

National Provider Identifier

1619048030

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Thomas P. Mcmahon
Credential MD
Sex Male
Practice address 100 Rosebrook Way, Wareham, MA, 02571
Phone (508) 973-4974
Fax (508) 273-4954
Enumeration date Nov 10, 2006
Last updated in NPPES Feb 2, 2026

Taxonomy & licenses

207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 6825 (RI) Secondary
207RG0100X Gastroenterology Physician Allopathic & Osteopathic Physicians · License 50774 (MA) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Thomas Mcmahon?
The National Provider Identifier (NPI) for Thomas Mcmahon is 1619048030, a Type 1 (individual) record in the CMS NPPES registry.
Where does Thomas Mcmahon practice?
The practice location on file with NPPES is in Wareham, MA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-02.