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

Ernest Castro, DPO II

Case Manager/Care Coordinator in Downey, CA · enumerated 2009.

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

National Provider Identifier

1093959942

Verified

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Registry record

Entity type Individual (Type 1)

Name Ernest Castro

Credential DPO II

Sex Male

Practice address Downey, CA, 90242

Phone (562) 940-3694

Fax (562) 658-7425

Enumeration date Apr 22, 2009

Last updated in NPPES Apr 22, 2009

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

Taxonomy & licenses

171M00000X Case Manager/Care Coordinator Other Service Providers · License 171M000000X (CA) Primary

Other identifiers

Identifier	Type	State	Issuer
171M00000X	Other	CA	PROBATION

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 Ernest Castro?

The National Provider Identifier (NPI) for Ernest Castro is 1093959942, a Type 1 (individual) record in the CMS NPPES registry.

Where does Ernest Castro practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-04-22.