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

Ruth E Castillo

Doula in San Antonio, TX · enumerated 2013.

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

National Provider Identifier

1780923144

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Registry record

Entity type Individual (Type 1)

Name Ruth E Castillo

Sex Female

Practice address San Antonio, TX, 78238

Phone (281) 386-8917

Enumeration date Feb 5, 2013

Last updated in NPPES Feb 5, 2013

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

Taxonomy & licenses

374J00000X Doula Nursing Service Related Providers Primary

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

What is the NPI number for Ruth Castillo?

The National Provider Identifier (NPI) for Ruth Castillo is 1780923144, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ruth Castillo practice?

The practice location on file with NPPES is in San Antonio, TX. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-02-05.