Psychologist | General Psychology

Dr. Grahamm Wiest, PSY.D.

26800 Crown Valley Pkwy Ste 320, Mission Viejo, California, 92691-7320

About Dr. Grahamm Wiest

Dr. Grahamm Wiest is a psychologist based in Mission Viejo, California who is specialized in General Psychology. Active license number of Dr. Grahamm Wiest is 34353 for Psychology in California. His current practice location is 26800 Crown Valley Pkwy Ste 320, Mission Viejo. Patients can contact him at 949-365-2468. Dr. Grahamm Wiest, PSY.D., specializes in General Psychology and his NPI number (Unique professional ID assigned by NPPES) is 1962015628.

Dr. Grahamm Wiest 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. Grahamm Wiest'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. Grahamm Wiest
Specialization General Psychology
Credentials PSY.D.
Gender Male
Practice Address: 26800 Crown Valley Pkwy Ste 320,
Mission Viejo, CA - 92691-7320

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 Number1962015628
NPI Enumeration Date: 24 Aug, 2020
NPI Last Update On: 15 Jul, 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. Grahamm Wiest are as mentioned below.

License NumberSpecializationStateStatus
34353Psychology CaliforniaPrimary
General Psychology 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. Grahamm Wiest
505 N Euclid St Ste 300,
Anaheim, CA - 92801-5514
Phone: 714-871-5646

Book an Appointment with Dr. Grahamm Wiest

To schedule an appointment, contact Dr. Grahamm Wiest at 26800 Crown Valley Pkwy Ste 320, Mission Viejo, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Grahamm Wiest:

Dr. Grahamm Wiest is a psychologist specializing in Psychology. He 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.

Yes, Dr. Grahamm Wiest 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. Grahamm Wiest practices at 26800 Crown Valley Pkwy Ste 320, Mission Viejo, California, 92691-7320.

To schedule an appointment with Dr. Grahamm Wiest, please contact the office at 949-365-2468.

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