Psychiatrist

Dr. Ralph Jan Koek, M.D.

26585 West Agoura Blvd., Ste 330, Calabasas, California, 91301

About Dr. Ralph Jan Koek

Dr. Ralph Jan Koek is a psychiatrist based in Calabasas, California who is specialized in Psychiatry. Active license number of Dr. Ralph Jan Koek is G058707 for Psychiatry in California. His current practice location is 26585 West Agoura Blvd., Ste 330, Calabasas. Patients can contact him at 818-876-1050. Dr. Ralph Jan Koek, M.D., specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1356428924.

Dr. Ralph Jan Koek specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Practice Information

Dr. Ralph Jan Koek'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. Ralph Jan Koek
Specialization Psychiatry
Credentials M.D.
Gender Male
Practice Address: 26585 West Agoura Blvd., Ste 330
Calabasas, CA - 91301

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 Number1356428924
NPI Enumeration Date: 01 Nov, 2006
NPI Last Update On: 27 Oct, 2022

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. Ralph Jan Koek are as mentioned below.

License NumberSpecializationStateStatus
G058707Psychiatry CaliforniaPrimary

Mailing Address

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

Dr. Ralph Jan Koek
5767 W Century Blvd Ste 400,
Los Angeles, CA - 90045-5631
Phone: 310-301-8771

Book an Appointment with Dr. Ralph Jan Koek

To schedule an appointment, contact Dr. Ralph Jan Koek at 26585 West Agoura Blvd., Ste 330, Calabasas, California or call the phone number listed below.

Book an Appointment

Frequently Asked Questions

Below are some commonly asked questions about Dr. Ralph Jan Koek:

Dr. Ralph Jan Koek is a psychiatrist specializing in Psychiatry. He specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

Yes, Dr. Ralph Jan Koek 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. Ralph Jan Koek practices at 26585 West Agoura Blvd., Ste 330, Calabasas, California, 91301.

To schedule an appointment with Dr. Ralph Jan Koek, please contact the office at 818-876-1050.

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