Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Aaron Grey Matlock, M.D.

Emergency Medicine Physician in Fort Sam Houston, TX · enumerated 2008.

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

National Provider Identifier

1689830697

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Registry record

Entity type Individual (Type 1)

Name Dr. Aaron Grey Matlock

Credential M.D.

Sex Male

Practice address 3551 Roger Brooke Dr, Fort Sam Houston, TX, 78234

Phone (210) 916-1983

Enumeration date Jul 30, 2008

Last updated in NPPES Dec 21, 2019

Taxonomy & licenses

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License M2140 (GU) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 132749 (AK) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 15682 (HI) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 60351665 (WA) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License 2019-0497 (NM) Secondary

207P00000X Emergency Medicine Physician Allopathic & Osteopathic Physicians · License Q3044 (TX) 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
353513008	Other	TX	CSHCN
353513007	Medicaid	TX	-

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

Is NPI 1689830697 active?

Yes, as of the latest NPPES snapshot, NPI 1689830697 is active (record last updated 2019-12-21).

How do I verify Aaron Matlock's NPI record?

Cross-check NPI 1689830697 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Other providers at this practice address

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Lan-Anh Ngo Family Medicine Physician · Jbsa Ft Sam Houston, TX NPI 1114922903 Lori Thelen Family Medicine Physician · Fort Sam Houston, TX NPI 1285633966 Cynthia Jones Occupational Therapist · Fort Sam Houston, TX NPI 1275532723 John Pena Medical Physician Assistant · Fort Sam Houston, TX NPI 1700885373 Denise Fricchione Medical Physician Assistant · Fort Sam Houston, TX NPI 1285633511 Kathryn Joyce Family Nurse Practitioner · Fort Sam Houston, TX NPI 1235139494 Barry Steever Adult Health Nurse Practitioner · San Antonio, TX NPI 1568463099 Kyle Friedman Anesthesiology Physician · Fort Sam Houston, TX NPI 1053303206

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2019-12-21.