Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
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Dr. Gary Aidan Hayes, PHD

Individual provider Clinical Psychologist · NPI 1801161203

Dr. Gary Aidan Hayes, PHD is a Clinical Psychologist in Napa, California. Qualified in 1986, 40 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
40
Licensed in
CA
In the registry since
2012
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

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Practice location Address checks out

1303 Jefferson St Ste 600A
Napa, CA 94559
Phone: (415) 827-9969
Fax: (707) 253-0457
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Clinical Psychologist (primary) Taxonomy 103TC0700X · Licence PSY10335 (CA)

Record details

NPI number1801161203
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedMarch 19, 2012
Last updated in NPPESMarch 19, 2025

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1986 (40 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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