Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sida Fang

Addiction (Substance Use Disorder) Psychologist in Redwood City, CA · enumerated 2025.

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

National Provider Identifier

1255210985

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Registry record

Entity type Individual (Type 1)

Name Sida Fang

Sex Male

Practice address 1779 Woodside Rd Ste 200, Redwood City, CA, 94061

Phone (650) 424-0854

Enumeration date Aug 27, 2025

Last updated in NPPES Aug 27, 2025

Taxonomy & licenses

103TA0400X Addiction (Substance Use Disorder) Psychologist 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 NPI 1255210985 active?

Yes, as of the latest NPPES snapshot, NPI 1255210985 is active (record last updated 2025-08-27).

How do I verify Sida Fang's NPI record?

Cross-check NPI 1255210985 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-08-27.