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Adam Rolland Diaz

Marriage & Family Therapist in Hayward, CA · enumerated 2023 · practices at Horizon Services, Inc.

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

National Provider Identifier

1528763117

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Registry record

Entity type Individual (Type 1)
Name Adam Rolland Diaz
Sex Male
Practice address Hayward, CA, 94545
Phone (510) 784-5874
Enumeration date Apr 3, 2023
Last updated in NPPES May 26, 2026

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

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License 146663 (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.

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Frequently asked questions

Where does Adam Diaz practice?
The practice location on file with NPPES is in Hayward, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Adam Diaz?
The National Provider Identifier (NPI) for Adam Diaz is 1528763117, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-26.