Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

John Davis Mckellar, PH.D.

Addiction (Substance Use Disorder) Psychologist in Los Gatos, CA · enumerated 2008.

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

National Provider Identifier

1184893778

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Registry record

Entity type Individual (Type 1)

Name John Davis Mckellar

Credential PH.D.

Sex Male

Practice address 15047 Los Gatos Blvd, Suite 200, Los Gatos, CA, 95032

Phone (408) 364-6799

Fax (408) 378-4510

Enumeration date Feb 27, 2008

Last updated in NPPES Jul 11, 2014

Taxonomy & licenses

103TA0400X Addiction (Substance Use Disorder) Psychologist Behavioral Health & Social Service Providers · License 18966 (CA) 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.

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Frequently asked questions

How do I verify John Mckellar's NPI record?

Cross-check NPI 1184893778 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1184893778 active?

Yes, as of the latest NPPES snapshot, NPI 1184893778 is active (record last updated 2014-07-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-07-11.