Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Desmond Thayer, PSY.D.
Psychologist in Represa, CA · enumerated 2014.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1457766156
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Registry record
Entity type Individual (Type 1)
Name Desmond Thayer
Credential PSY.D.
Sex Male
Practice address 100 Prison Rd, Represa, CA, 95671
Phone (916) 985-8610
Enumeration date Jun 22, 2014
Last updated in NPPES Aug 30, 2022
Taxonomy & licenses
103T00000X Psychologist Behavioral Health & Social Service Providers · License PSY29042 (CA) Primary
PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice.
About the PSYD credential
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
What is the NPI number for Desmond Thayer?
The National Provider Identifier (NPI) for Desmond Thayer is 1457766156, a Type 1 (individual) record in the CMS NPPES registry.
Where does Desmond Thayer practice?
The practice location on file with NPPES is in Represa, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Gregory Tinloy Dentist · Represa, CA NPI 1588661730 Resul Ozbayrak Psychiatry Physician · Represa, CA NPI 1245203934 Kathryn Peters Pharmacist · Represa, CA NPI 1730269929 Carrie Brecker Clinical Psychologist · Represa, CA NPI 1063598894 Susanna Farina Clinical Psychologist · Represa, CA NPI 1013089945 Brittany Brizendine Clinical Psychologist · Represa, CA NPI 1184831943 Barbara Smith Psychiatry Physician · Represa, CA NPI 1316157753 Sam Tan Dentist · Represa, CA NPI 1194921072
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-30.