Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Alejandro Jose Mendoza-Castillo

Counselor in Concord, CA · enumerated 2012.

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

National Provider Identifier

1649529629

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)

Name Mr. Alejandro Jose Mendoza-Castillo

Sex Male

Practice address 2118 Willow Pass Rd, Suite 500, Concord, CA, 94520

Phone (925) 692-0090

Fax (925) 692-0091

Enumeration date Sep 5, 2012

Last updated in NPPES Sep 5, 2012

Taxonomy & licenses

101Y00000X Counselor Behavioral Health & Social Service 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

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Alejandro Mendoza-Castillo?

Alejandro Mendoza-Castillo is registered in NPPES with the primary taxonomy of Counselor. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-09-05.