Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Dr. William Keith Marek, PHD

Individual provider Psychologist · NPI 1851560544

Dr. William Keith Marek, PHD is a Clinical Psychologist in San Ramon, California. Qualified in 1989, 37 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
37
Licensed in
CA
In the registry since
2008
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

105 Reflections Dr Apt 18
San Ramon, CA 94583-4709
Phone: (925) 275-0294
Fax: (925) 426-0094
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence PSY 14791 (CA)

Record details

NPI number1851560544
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedFebruary 27, 2008
Last updated in NPPESFebruary 27, 2008
Mailing address105 Reflections Dr, Apt. 18, San Ramon, CA 94583-4709

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 1989 (37 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services
Practice locations2 on file with Medicare

Other providers in San Ramon