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

Dr. Gary David Newquist, PH.D.

Clinical Psychologist in Agoura Hills, CA · enumerated 2007 · practices at Broad Horizons Marriage and Family Counseling, Prof. Corp..

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

National Provider Identifier

1669684627

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Registry record

Entity type Individual (Type 1)

Name Dr. Gary David Newquist

Credential PH.D.

Sex Male

Practice address Agoura Hills, CA, 91301

Phone (805) 603-3282

Enumeration date May 4, 2007

Last updated in NPPES Nov 4, 2015

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

Taxonomy & licenses

106H00000X Marriage & Family Therapist Behavioral Health & Social Service Providers · License MFC17973 (CA) Secondary

103TC0700X Clinical Psychologist Behavioral Health & Social Service Providers · License PSY10987 (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

Where does Gary Newquist practice?

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

What is the NPI number for Gary Newquist?

The National Provider Identifier (NPI) for Gary Newquist is 1669684627, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Mary Chernoff Psychologist · Agoura Hills, CA NPI 1346253929 Teri Hartt Mental Health Counselor · Agoura, CA NPI 1699817296 Suzanne Schuda Marriage & Family Therapist · Agoura Hills, CA NPI 1144358318 Lori Ross Marriage & Family Therapist · Agoura Hills, CA NPI 1609907831 Stephen Winston Clinical Psychologist · Agoura Hills, CA NPI 1730204884 Lisa Harris Clinical Psychologist · Agoura Hills, CA NPI 1730205071 Veronica Winston Marriage & Family Therapist · Agoura Hills, CA NPI 1447373444 Batya Zimmerman Marriage & Family Therapist · Agoura Hills, CA NPI 1184849374

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-11-04.