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.

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Practice location Address checks out

20111 Stevens Creek Blvd Ste 250
Cupertino, CA 95014-2399
Phone: (408) 366-9910
Fax: (408) 366-9915
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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
Mailing address20111 Stevens Creek Blvd, Suite 250, Cupertino, CA 95014-2399

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