Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Alvin Tan

Q: What is the NPI number for Alvin Tan?

The National Provider Identifier (NPI) for Alvin Tan is 1588079123, a Type 1 (individual) record in the CMS NPPES registry.

Clinical Social Worker in East Palo Alto, CA · enumerated 2014 · practices at San Mateo County.

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

National Provider Identifier

1588079123

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Registry record

Entity type Individual (Type 1)

Name Alvin Tan

Sex Male

Practice address 2415 University Ave Ste 301, East Palo Alto, CA, 94303

Phone (650) 363-4030

Fax (650) 328-6834

Enumeration date Jun 23, 2014

Last updated in NPPES Mar 17, 2025

Taxonomy & licenses

101YM0800X Mental Health Counselor Behavioral Health & Social Service Providers Secondary

390200000X Student in an Organized Health Care Education/Training Program Student, Health Care Secondary

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 94348 (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 Alvin Tan practice?

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

What is the NPI number for Alvin Tan?

The National Provider Identifier (NPI) for Alvin Tan is 1588079123, 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 2025-03-17.