Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Alexander John Mcmahon, D.D.S., M.D.

Oral & Maxillofacial Surgery (D.M.D.) in Los Angeles, CA · enumerated 2016.

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

National Provider Identifier

1225487622

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Registry record

Entity type Individual (Type 1)

Name Dr. Alexander John Mcmahon

Credential D.D.S., M.D.

Sex Male

Practice address Los Angeles, CA, 90095

Phone (310) 825-0834

Enumeration date Jun 7, 2016

Last updated in NPPES Dec 18, 2018

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 65087 (CA) Secondary

1223S0112X Oral and Maxillofacial Surgery (Dentist) Dental Providers · License 65087 (CA) Secondary

204E00000X Oral & Maxillofacial Surgery (D.M.D.) Allopathic & Osteopathic Physicians · License 65087 (CA) Primary

DDS · Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS 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.

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Frequently asked questions

How do I verify Alexander Mcmahon's NPI record?

Cross-check NPI 1225487622 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1225487622 active?

Yes, as of the latest NPPES snapshot, NPI 1225487622 is active (record last updated 2018-12-18).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-12-18.