Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gilbert Anthony Roos

Q: What is the NPI number for Gilbert Roos?

The National Provider Identifier (NPI) for Gilbert Roos is 1821721291, a Type 1 (individual) record in the CMS NPPES registry.

Community Health Worker in Hayward, CA · enumerated 2022.

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

National Provider Identifier

1821721291

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Registry record

Entity type Individual (Type 1)

Name Gilbert Anthony Roos

Sex Male

Practice address 795 Fletcher Ln, Hayward, CA, 94544

Phone (510) 247-8300

Enumeration date Jul 5, 2022

Last updated in NPPES Feb 14, 2024

Taxonomy & licenses

101YA0400X Addiction (Substance Use Disorder) Counselor Behavioral Health & Social Service Providers Secondary

172V00000X Community Health Worker Other 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

Where does Gilbert Roos 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 Gilbert Roos?

The National Provider Identifier (NPI) for Gilbert Roos is 1821721291, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Shelley O'Sullivan Addiction (Substance Use Disorder) Counselor · Hayward, CA NPI 1952522898 Robin Rosenblatt Psychiatric/Mental Health Registered Nurse · Hayward, CA NPI 1154533131 Gayle Hoffman Licensed Vocational Nurse · Hayward, CA NPI 1912110883 Maria Vermazen Addiction (Substance Use Disorder) Counselor · Hayward, CA NPI 1639370240 Kathryn Miller Addiction (Substance Use Disorder) Counselor · Hayward, CA NPI 1992027080 Serena Urive Addiction (Substance Use Disorder) Counselor · Hayward, CA NPI 1255636734 Daniel Rodriguez Addiction (Substance Use Disorder) Counselor · Hayward, CA NPI 1073870820 Theresa Blaylock Addiction (Substance Use Disorder) Counselor · Hayward, CA NPI 1962844027

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-02-14.