DR. WARREN RITCHIE CHRISTIANSON II D.O.
NPI 1932359445
Psychiatry & Neurology - Psychiatry in San Marino, CA

Q: What is Warren Christianson's NPI number?

The NPI number for Warren Christianson is 1932359445. It was assigned to this individual provider in the NPPES registry on September 22, 2008.

Q: What is Warren Christianson's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Active since September 22, 2008PECOS EnrolledAccepts Medicare Assignment

2400 MISSION ST, SAN MARINO, CA 91108(626) 403-8999(626) 403-8989 Get Directions Write a Review

NPPES record last updated: September 21, 2011. Verified against the NPPES registry weekly; last sync: August 16, 2026.

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About Dr. Warren Ritchie Christianson Ii D.o. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WARREN RITCHIE CHRISTIANSON II D.O. (NPI 1932359445) is an individual psychiatry provider in San Marino, California, licensed in California (20A9664) and active in the NPI registry since September 2008. He is enrolled in Medicare PECOS and is a graduate of Other (2004).

NPPES Registry Identity

NPI1932359445

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameDR. WARREN RITCHIE CHRISTIANSON IICredential: D.O.

Location Address2400 MISSION STSan Marino, CA 91108-1632

Mailing Address2400 Mission StSan Marino, CA 91108-1632 · (626) 403-8999 · Fax (626) 403-8989

Phone(626) 403-8999

Fax(626) 403-8989

Sole ProprietorNo

Medical School CMSOtherGraduated 2004

Enumeration DateSeptember 22, 2008

Last NPPES UpdateSeptember 21, 2011

✔ NPI 1932359445 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in CA · 20A9664

Definition

A Psychiatrist 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.

2400 MISSION ST, San Marino, CA 91108

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Warren Ritchie Christianson Ii D.o. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5597936963

PECOS Enrollment IDI20110914000671

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 91108 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$187.60 typical visit price

range $62.96 – $187.60

Typical copayment $46.90 (range $15.74 – $46.90)

Most-billed visit code 99205

Established Patient

$77.96 typical visit price

range $20.84 – $153.61

Typical copayment $19.49 (range $5.21 – $38.40)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

KAREN O GATES L.C.S.W.

Social Worker (Clinical)