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

Individual provider Clinical Psychologist · NPI 1508162686

Dr. Joy Stephenson Kolker, PHD is a Clinical Psychologist in Santa Rosa, California. Qualified in 2008, 18 years ago. Practices as a sole proprietor, accepts Medicare assignment and offers telehealth. Licensed in California.

Years since qualifying
18
Licensed in
CA
In the registry since
2011
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

818 Cherry St
Santa Rosa, CA 95404-4207
Phone: (707) 257-7900
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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 23656 (CA)

Record details

NPI number1508162686
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedFebruary 7, 2011
Last updated in NPPESDecember 9, 2015

Medicare enrollment

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

Medicare specialtyCLINICAL PSYCHOLOGIST
Medical schoolOTHER
Graduated 2008 (18 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
TelehealthOffers telehealth services

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