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

Dr. Leonard J Donk, PHD

Individual provider Psychologist · NPI 1942420591

Dr. Leonard J Donk, PHD is a Psychologist in Cupertino, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2007
Specialties on file
8
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

20111 Stevens Creek Blvd Ste 250
Cupertino, CA 95014-2399
Phone: (408) 366-9910
Fax: (408) 366-9915
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

Clinical Child & Adolescent Psychologist (primary) Taxonomy 103TC2200X · Licence 9064 (CA)
Psychologist Taxonomy 103T00000X · Licence 9064 (CA)
Cognitive & Behavioral Psychologist Taxonomy 103TB0200X · Licence 9064 (CA)
Clinical Psychologist Taxonomy 103TC0700X · Licence 9064 (CA)
Counseling Psychologist Taxonomy 103TC1900X · Licence 9064 (CA)
Forensic Psychologist Taxonomy 103TF0200X · Licence 9064 (CA)
Health Psychologist Taxonomy 103TH0004X · Licence 9064 (CA)
Psychoanalysis Psychologist Taxonomy 103TP0814X · Licence 9064 (CA)

Record details

NPI number1942420591
Entity typeIndividual (Type 1)
GenderMale
Credentials PHD
Sole proprietorYes
NPI enumeratedApril 26, 2007
Last updated in NPPESSeptember 11, 2025

Other providers in Cupertino