Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Alonso Del Castillo

Pharmacist in San Diego, CA · enumerated 2021.

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

National Provider Identifier

1881276327

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Registry record

Entity type Individual (Type 1)

Name Mr. Alonso Del Castillo

Sex Male

Practice address 3915 Riviera Dr Unit A, San Diego, CA, 92109

Phone (818) 307-7991

Enumeration date Apr 23, 2021

Last updated in NPPES Apr 23, 2021

Taxonomy & licenses

183500000X Pharmacist Pharmacy Service Providers · License 43548 (CA) 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

Where does Alonso Del Castillo practice?

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

What is the NPI number for Alonso Del Castillo?

The National Provider Identifier (NPI) for Alonso Del Castillo is 1881276327, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-04-23.