Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Kenneth Mark Derby, PH.D.

Clinical Psychologist in Spokane, WA · enumerated 2007.

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

National Provider Identifier

1679611420

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Registry record

Entity type Individual (Type 1)

Name Dr. Kenneth Mark Derby

Credential PH.D.

Sex Male

Practice address 1124 E 35th Ave, Spokane, WA, 99203

Phone (509) 747-7460

Fax (509) 323-5965

Enumeration date Feb 2, 2007

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

103TB0200X Cognitive & Behavioral Psychologist Behavioral Health & Social Service Providers · License 2204 (WA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License 2204 (WA) Primary

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

What is the NPI number for Kenneth Derby?

The National Provider Identifier (NPI) for Kenneth Derby is 1679611420, a Type 1 (individual) record in the CMS NPPES registry.

Where does Kenneth Derby practice?

The practice location on file with NPPES is in Spokane, WA. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.