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

Dr. Carlos A Castro Maldonado, O.D.

Optometrist in Corpus Christi, TX · enumerated 2007.

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

National Provider Identifier

1881733640

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Registry record

Entity type Individual (Type 1)

Name Dr. Carlos A Castro Maldonado

Credential O.D.

Sex Male

Practice address Corpus Christi, TX, 78411

Phone (361) 992-6700

Enumeration date Feb 6, 2007

Last updated in NPPES Jun 25, 2018

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

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 540 (PR) Primary

OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier	Type	State	Issuer
100030	Other	PA	LA CRUZ AZUL
660614288	Other	PR	COSVI
890162	Other	PR	MEDICARE Y MUCHO MAS
7140015	Other	PR	HUMANA HEALTH PLANS
50662	Other	PR	PMC

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 Carlos Castro Maldonado's NPI record?

Cross-check NPI 1881733640 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1881733640 active?

Yes, as of the latest NPPES snapshot, NPI 1881733640 is active (record last updated 2018-06-25).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-06-25.