Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Gregory S. Greenberg, Ph.D., Pllc

Q: What is the NPI number for Gregory S. Greenberg, Ph.D., Pllc?

The NPI for Gregory S. Greenberg, Ph.D., Pllc is 1538280060, a Type 2 (organization) record in the CMS NPPES registry.

Psychologist in Bellevue, WA · enumerated 2007 · authorized official Gregory Greenberg, Member & Manager.

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

National Provider Identifier

1538280060

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Registry record

Entity type Organization (Type 2)

Legal business name Gregory S. Greenberg, Ph.D., Pllc

Practice address 1601 114th Ave Se, Suite 107, Bellevue, WA, 98004

Phone (425) 637-7700

Fax (425) 635-0405

Enumeration date Apr 3, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

103T00000X Psychologist Behavioral Health & Social Service Providers · License PY00001293 (WA) Primary

Authorized official

Name Gregory Greenberg

Title Member & Manager

Phone (425) 637-7700

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

What is the NPI number for Gregory S. Greenberg, Ph.D., Pllc?

The NPI for Gregory S. Greenberg, Ph.D., Pllc is 1538280060, a Type 2 (organization) record in the CMS NPPES registry.

Who is the authorized official for Gregory S. Greenberg, Ph.D., Pllc?

NPPES lists Gregory Greenberg (Member & Manager) as the authorized official for this organization.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.