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

Dr. Francisco J Montemayor, MD

Pediatrics Physician in San Antonio, TX · enumerated 2006 · practices at Francisco J. Montemayor, M.D., P.A..

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

National Provider Identifier

1811964166

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Registry record

Entity type Individual (Type 1)

Name Dr. Francisco J Montemayor

Credential MD

Sex Male

Practice address San Antonio, TX, 78216

Phone (210) 342-3838

Fax (210) 342-7705

Enumeration date Mar 7, 2006

Last updated in NPPES Nov 19, 2011

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

Taxonomy & licenses

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians · License J4365 (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
127111605	Other	TX	TPI
P000496M8	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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Francisco Montemayor's NPI record?

Cross-check NPI 1811964166 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1811964166 active?

Yes, as of the latest NPPES snapshot, NPI 1811964166 is active (record last updated 2011-11-19).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2011-11-19.