Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Thalia Pitsillidou Sullivan Nicholson, PHD

Psychologist in Auburn, CA · enumerated 2021.

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

National Provider Identifier

1760053136

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Registry record

Entity type Individual (Type 1)

Name Thalia Pitsillidou Sullivan Nicholson

Credential PHD

Sex Female

Practice address 140 Pine St, Auburn, CA, 95603

Phone (530) 423-3714

Enumeration date Jul 7, 2021

Last updated in NPPES Feb 26, 2026

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 35995 (CA) Primary

103T00000X Psychologist Behavioral Health & Social Service Providers · License 1300 (NV) Secondary

PHD · Doctor of Philosophy: A doctoral degree; in healthcare often held by clinical psychologists and researchers. About the PHD 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.

Read the full guide → Validate an NPI →

Frequently asked questions

How do I verify Thalia Sullivan Nicholson's NPI record?

Cross-check NPI 1760053136 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1760053136 active?

Yes, as of the latest NPPES snapshot, NPI 1760053136 is active (record last updated 2026-02-26).

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-02-26.