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

Dr. Alejandro Mendez Castillo, M.D.

Diagnostic Radiology Physician in Farmington, MO · enumerated 2005.

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

National Provider Identifier

1649255076

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Registry record

Entity type Individual (Type 1)

Name Dr. Alejandro Mendez Castillo

Credential M.D.

Sex Male

Practice address Farmington, MO, 63640

Phone (573) 756-6451

Enumeration date Dec 8, 2005

Last updated in NPPES Dec 21, 2025

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

Taxonomy & licenses

2085R0202X Diagnostic Radiology Physician Allopathic & Osteopathic Physicians · License 2005027156 (MO) 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
431142188OSU	Other	-	MERCY
207432501	Medicaid	MO	-
720096	Other	-	HEALTHLINK
140376000	Other	-	DEPT OF LABOR
4964V4964	Other	-	GHP
1765	Other	MO	BCBS

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 Alejandro Mendez Castillo's NPI record?

Cross-check NPI 1649255076 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1649255076 active?

Yes, as of the latest NPPES snapshot, NPI 1649255076 is active (record last updated 2025-12-21).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-12-21.