NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Tamsen Willits Ladou, PH.D.

Psychologist in Temecula, CA · enumerated 2007.

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

National Provider Identifier

1316121585

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Dr. Tamsen Willits Ladou
Credential PH.D.
Sex Female
Practice address Temecula, CA, 92592
Phone (760) 994-6450
Enumeration date Dec 24, 2007
Last updated in NPPES Jul 15, 2013

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

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY 21426 (CA) Primary
PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD credential

Other identifiers

Identifier Type State Issuer
EW067A Other CA MEDICARE PTAN

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 Tamsen Ladou practice?
The practice location on file with NPPES is in Temecula, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Tamsen Ladou?
The National Provider Identifier (NPI) for Tamsen Ladou is 1316121585, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2013-07-15.