Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Matthew C. Brennan, MD

Maternal & Fetal Medicine Physician in Albuquerque, NM · enumerated 2005.

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

National Provider Identifier

1689661175

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Registry record

Entity type Individual (Type 1)

Name Dr. Matthew C. Brennan

Credential MD

Sex Male

Practice address 201 Cedar St Se, #405, Albuquerque, NM, 87106

Phone (505) 764-9535

Fax (505) 924-7336

Enumeration date Sep 30, 2005

Last updated in NPPES Jan 15, 2025

Taxonomy & licenses

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians · License AA5278 (AK) Secondary

207VM0101X Maternal & Fetal Medicine Physician Allopathic & Osteopathic Physicians · License 2002-0460 (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
48805815	Medicaid	NM	-
MD5278	Medicaid	AK	-

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 NPI 1689661175 active?

Yes, as of the latest NPPES snapshot, NPI 1689661175 is active (record last updated 2025-01-15).

How do I verify Matthew Brennan's NPI record?

Cross-check NPI 1689661175 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-01-15.