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

Dr. Diane Harnish, PHD

Individual provider Mental Health Counselor · NPI 1962791640

Dr. Diane Harnish, PHD is a Clinical Psychologist in Sebastopol, 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
Specialties on file
2
What do these letters mean?
PHD — Doctor of Philosophy
A research doctorate. In healthcare it usually sits alongside a clinical licence.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

6741 Redwood Ave
Sebastopol, CA 95472-4514
Phone: (415) 924-4252
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychologist (primary) Taxonomy 103T00000X · Licence PSY 24138 (CA)
Mental Health Counselor Taxonomy 101YM0800X · Licence PSY24138 (CA)

Record details

NPI number1962791640
Entity typeIndividual (Type 1)
GenderFemale
Credentials PHD
Sole proprietorYes
NPI enumeratedApril 1, 2011
Last updated in NPPESDecember 6, 2024
Certification dateDecember 6, 2024
Mailing address6741 Redwood Ave, Sebastopol, CA 95472-4514

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

Other providers in Sebastopol