Psychiatrist | 22+ years experience

Dr. Warren Ritchie Christianson Ii, D.O.

2400 Mission St, San Marino, California, 91108-1632

About Dr. Warren Ritchie Christianson Ii

Dr. Warren Ritchie Christianson Ii is a psychiatrist based in San Marino, California with 22 years of experience in Psychiatry. He completed his graduation in 2004. He accepts the Medicare-approved amount. Patients will not be billed for any more than the Medicare deductible and coinsurance. Active license number of Dr. Warren Ritchie Christianson Ii is 20A9664 for Psychiatry in California. His current practice location is 2400 Mission St, San Marino. Patients can contact him at 626-403-8999 or can fax him at 626-403-8989. Dr. Warren Ritchie Christianson Ii, D.O., specializes in Psychiatry and his NPI number (Unique professional ID assigned by NPPES) is 1932359445.

Dr. Warren Ritchie Christianson Ii 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. Warren Ritchie Christianson Ii'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. Warren Ritchie Christianson Ii
Specialization Psychiatry
Credentials D.O.
Accepts Medicare Assignment Yes
Experience 22+ years
Graduation Year 2004
Gender Male
Practice Address: 2400 Mission St,
San Marino, CA - 91108-1632
Fax 626-403-8989

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.

PAC ID 5597936963
Enrollment ID I20110914000671
NPI Number1932359445
NPI Enumeration Date: 22 Sep, 2008
NPI Last Update On: 21 Sep, 2011

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. Warren Ritchie Christianson Ii are as mentioned below.

License NumberSpecializationStateStatus
20A9664Psychiatry CaliforniaPrimary

Group Practice

Group practices are practice of medicine by a group of healthcare professionals who share their premises and other resources. Following list states all the group name with which Dr. Warren Ritchie Christianson Ii is associated with along with the number of members in that group.
Organization Name (Group PAC ID) Members
San Marino Psychiatric Associates Inc (6709864895)4
Vista Community Clinic (0042120156)12

Mailing Address

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

Dr. Warren Ritchie Christianson Ii
2400 Mission St,
San Marino, CA - 91108-1632
Phone: 626-403-8999
Fax: 626-403-8989

Book an Appointment with Dr. Warren Ritchie Christianson Ii

To schedule an appointment, contact Dr. Warren Ritchie Christianson Ii at 2400 Mission St, San Marino, California or call the phone number listed below.

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Frequently Asked Questions

Below are some commonly asked questions about Dr. Warren Ritchie Christianson Ii:

Dr. Warren Ritchie Christianson Ii 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.

Dr. Warren Ritchie Christianson Ii has approximately 22 years of experience in Psychiatry.

Yes, Dr. Warren Ritchie Christianson Ii accepts Medicare assignment, meaning the provider participates in Medicare and accepts Medicare-approved amounts for eligible services.

Yes, Dr. Warren Ritchie Christianson Ii 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. Warren Ritchie Christianson Ii practices at 2400 Mission St, San Marino, California, 91108-1632.

To schedule an appointment with Dr. Warren Ritchie Christianson Ii, please contact the office at 626-403-8999.

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