Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sarah Villarreal
Psychologist in Mill Valley, CA · enumerated 2020.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1174144109
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Registry record
Entity type Individual (Type 1)
Name Sarah Villarreal
Sex Female
Practice address 135 Stanford Ave, Mill Valley, CA, 94941
Phone (415) 268-9787
Enumeration date Apr 30, 2020
Last updated in NPPES Apr 30, 2020
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY20291 (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.
Frequently asked questions
Is NPI 1174144109 active?
Yes, as of the latest NPPES snapshot, NPI 1174144109 is active (record last updated 2020-04-30).
How do I verify Sarah Villarreal's NPI record?
Cross-check NPI 1174144109 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-04-30.