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Mr. John Matthew Fay, MD

Family Medicine Physician in Los Alamos, NM · enumerated 2006.

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

National Provider Identifier

1104888783

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Registry record

Entity type Individual (Type 1)
Name Mr. John Matthew Fay
Credential MD
Sex Male
Practice address 3917 West Road, Suite A Mannm, Los Alamos, NM, 87544
Phone (505) 661-8900
Fax (505) 661-8916
Enumeration date Apr 6, 2006
Last updated in NPPES Jan 17, 2012

Taxonomy & licenses

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License DR44193 (CO) Secondary
207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians · License MD20060672 (NM) Primary
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier Type State Issuer
53123877 Medicaid NM -

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

Where does John Fay practice?
The practice location on file with NPPES is in Los Alamos, NM. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for John Fay?
The National Provider Identifier (NPI) for John Fay is 1104888783, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-01-17.