NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Brian Henry Mahon, MD

Diagnostic Radiology Physician in Galveston, TX · enumerated 2013.

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

National Provider Identifier

1790128197

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Brian Henry Mahon
Credential MD
Sex Male
Practice address 301 University Blvd, Galveston, TX, 77555
Phone (409) 747-2849
Fax (409) 772-7120
Enumeration date Apr 16, 2013
Last updated in NPPES Jul 24, 2019

Taxonomy & licenses

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary
2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 82459 (SC) 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

Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is Brian Mahon?
Brian Mahon is registered in NPPES with the primary taxonomy of Diagnostic Radiology Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-07-24.