Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Warren Ritchie Christianson II, DO

Individual provider Psychiatry Physician · NPI 1932359445

Dr. Warren Ritchie Christianson II, DO is a Psychiatry in San Marino, California. Qualified in 2004, 22 years ago. Practices with Vista Community Clinic, a 44-clinician group and accepts Medicare assignment. Licensed in California.

Years since qualifying
22
Licensed in
CA
In the registry since
2008
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

2400 Mission St
San Marino, CA 91108-1632
Phone: (626) 403-8999
Fax: (626) 403-8989
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Psychiatry Physician (primary) Taxonomy 2084P0800X · Licence 20A9664 (CA)

Record details

NPI number1932359445
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedSeptember 22, 2008
Last updated in NPPESSeptember 21, 2011

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPSYCHIATRY
Medical schoolOTHER
Graduated 2004 (22 years in practice)
Group practice Vista Community Clinic — 44 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

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