Psychologist | General Psychology

Dr. Leonard J Donk, PHD

20111 Stevens Creek Blvd, Suite 250, Cupertino, California, 95014-2399

About Dr. Leonard J Donk

Dr. Leonard J Donk is a psychologist based in Cupertino, California who is specialized in General Psychology. Active license number of Dr. Leonard J Donk is 9064 for Clinical Child & Adolescent Psychology in California. His current practice location is 20111 Stevens Creek Blvd, Suite 250, Cupertino. Patients can contact him at 408-366-9910 or can fax him at 408-366-9915. Dr. Leonard J Donk, PHD, specializes in General Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1942420591.

Dr. Leonard J Donk is specialized in psychological testing and evaluating or assessing patient's personal characteristics, such as intelligence, personality, abilities, interests, aptitudes, and neuropsychological functioning. Accordingly, he performs counseling, psychoanalysis, psychotherapy, hypnosis, biofeedback, and behavior analysis and therapy. He can diagnose and treat mental and emotional disorder or disability, alcoholism and substance abuse, disorders of habit or conduct, as well as of the psychological aspects of physical illness, accident, injury, or disability by psycheducational evaluation, therapy, remediation, and consultation.

Practice Information

Dr. Leonard J Donk's specialty, credentials, practice address, contact phone number and fax are as below. Patients can call on the below given phone number for appointment.

Provider Name Dr. Leonard J Donk
Specialization General Psychology
Credentials PHD
Gender Male
Practice Address: 20111 Stevens Creek Blvd, Suite 250
Cupertino, CA - 95014-2399
Fax 408-366-9915

Professional Identification Codes

NPI number stands for National Provider Identifier which is a unique 10-digit identification number issued to healthcare providers in the United States by the Centers for Medicare and Medicaid Services (CMS). NPI details are as mentioned below.

NPI Number1942420591
NPI Enumeration Date: 26 Apr, 2007
NPI Last Update On: 11 Sep, 2025

Medical Licenses:

Healthcare professionals can hold one or more medical licenses for different specialties in the same state or different states. Related medical licenses for Dr. Leonard J Donk are as mentioned below.

License NumberSpecializationStateStatus
9064Clinical Child & Adolescent Psychology CaliforniaPrimary
9064General Psychology CaliforniaSecondary
9064Cognitive & Behavioral Psychology CaliforniaSecondary
9064Clinical Psychology CaliforniaSecondary
9064Counseling Psychology CaliforniaSecondary
9064Forensic Psychology CaliforniaSecondary
9064Health Psychology CaliforniaSecondary
9064Psychoanalysis CaliforniaSecondary

Mailing Address

Business mailing address can be used for mailing purpose only, for visiting purpose patients need to refer above mentioned Practice address.

Dr. Leonard J Donk
20111 Stevens Creek Blvd, Suite 250
Cupertino, CA - 95014-2399
Phone: 408-366-9910
Fax: 408-366-9915

Book an Appointment with Dr. Leonard J Donk

To schedule an appointment, contact Dr. Leonard J Donk at 20111 Stevens Creek Blvd, Suite 250, Cupertino, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Leonard J Donk:

Dr. Leonard J Donk is a psychologist specializing in Clinical Child & Adolescent Psychology. He analyse the cognitive, social and emotional development of children. Typically, he look at development from the prenatal period through adolescence. Some of the traditional areas of interest include genetics, language development, learning disabilities, personality, gender roles, cognitive development, sexual development and social growth.
Clinical Child Psychologist responsibilities includes task like assessing and treating learning or developmental disabilities or delays; Working with children and their caregivers to manage behavioral issues; Administering psychological tests; Conducting scientific research on childhood development; Working with a health care team to create a unique treatment plan for a client.

Yes, Dr. Leonard J Donk is currently accepting new patients. To schedule an appointment, contact the office directly and schedule an appointment.
*Availability may change. Please contact the office directly to ask about appointments.

Dr. Leonard J Donk practices at 20111 Stevens Creek Blvd, Suite 250, Cupertino, California, 95014-2399.

To schedule an appointment with Dr. Leonard J Donk, please contact the office at 408-366-9910.

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**Data of this site is collected from Medicare & Medicaid Services (CMS) and NPPES. Last updated on 14 September, 2026.