Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Dr. Craig B. Grether, PH.D.

Clinical Psychologist in Carlsbad, CA · enumerated 2010.

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

National Provider Identifier

1215256797

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Registry record

Entity type Individual (Type 1)

Name Dr. Craig B. Grether

Credential PH.D.

Sex Male

Practice address Carlsbad, CA, 92008

Phone (760) 477-8585

Fax (760) 444-4786

Enumeration date May 24, 2010

Last updated in NPPES May 2, 2016

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers · License PSY18336 (CA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY18336 (CA) Primary

103TF0000X Family Psychologist Behavioral Health & Social Service Providers · License PSY18336 (CA) Secondary

103TR0400X Rehabilitation Psychologist Behavioral Health & Social Service Providers · License PSY18336 (CA) Secondary

103TH0100X Health Service Psychologist Behavioral Health & Social Service Providers · License PSY18336 (CA) 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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Craig Grether?

Craig Grether is registered in NPPES with the primary taxonomy of Clinical Psychologist. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-05-02.