Individual provider Active NPI

Warren Ritchie Christianson II, D.O.

  • Psychiatry Physician
  • San Marino, CA
National Provider Identifier
1932359445
Registry record updated Sep 21, 2011
On this page

Key facts

NPPES NPI Registry
Primary specialty
Psychiatry PhysicianTaxonomy code 2084P0800X
License
20A9664 Issued in CA
Practice address
2400 Mission St
San Marino, CA 91108-1632
Phone
(626) 403-8999
Fax
(626) 403-8989
NPI assigned
Sep 22, 2008
Last updated
Sep 21, 2011By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 21, 2011

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Psychiatry Physician 2084P0800X 20A9664 CA Primary

Addresses

Primary practice location

2400 Mission St
San Marino, CA 91108-1632

Mailing address

2400 Mission St
San Marino, CA 91108-1632
Phone (626) 403-8999

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in CA
Eligible to order & refer
  • Part B services: Yes
  • Medical equipment: Yes
  • Home health: Yes
  • Power mobility devices: Yes
  • Hospice: Yes
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20110914000671 CA Practitioner - Psychiatry 5597936963 Reassigns benefits to 2 organizations

Care Compare profile

Medicare Care Compare
Specialty
Psychiatry
Education
Other, 2004
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Group practices
Vista Community ClinicGroup PAC ID 0042120156, shared by 5 NPIs, 44 clinicians
San Marino Psychiatric Associates IncGroup PAC ID 6709864895, 6 clinicians

Practice addresses (Care Compare)

1000 Vale Terrace Dr
Vista, CA 92084-5218
Phone (760) 631-5000

2400 Mission St
San Marino, CA 91108-1632
Phone (626) 403-8999

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Osteopathy

State licenses

LicenseStateTypeSpecialty
9664CAMDPediatric Dentist
20A9664CAMDPsychiatry Physician

Practice roles

OrganizationSpecialtyStatusNew patients
San Marino Psychiatric Associates, Inc. Psychiatry CurrentSince Aug 8, 2011 Accepting new patients
Dap Health, Inc. Current Accepting new patients
Shasta Community Health Center Psychiatry CurrentSince Feb 1, 2026 Accepting new patients
Shasta Community Health Center CurrentSince Feb 1, 2026 Accepting new patients
Vista Community Clinic Past Accepting new patients
Vista Community Clinic Past Accepting new patients

Locations

133 W Main St
El Cajon, CA 92020
Phone (619) 401-0404

1035 Placer St
Redding, CA 96001

4215 Front St
Shasta Lake, CA 96019
Phone (530) 246-5896

Networks

  • BSC 65 PLUS INDIVIDUAL MAPD

Interoperability endpoints

  • Direct secure messaging: warren.christiansondo.p1@direct.schc.nextgenshare.com
  • Direct secure messaging: warren.christiansondo.p1@direct.vistacommunityclinic.nextgenshare.com

Organizations & group practices 7

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

NPI Registry JSON

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1222041600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1316563200000",
    "number": "1932359445",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2400 MISSION ST",
            "city": "SAN MARINO",
            "state": "CA",
            "postal_code": "911081632",
            "telephone_number": "626-403-8999",
            "fax_number": "626-403-8989"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2400 MISSION ST",
            "city": "SAN MARINO",
            "state": "CA",
            "postal_code": "911081632",
            "telephone_number": "626-403-8999",
            "fax_number": "626-403-8989"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHRISTIANSON",
        "first_name": "WARREN",
        "middle_name": "RITCHIE",
        "name_prefix": "Dr.",
        "name_suffix": "II",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-09-22",
        "last_updated": "2011-09-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2084P0800X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Psychiatry",
            "state": "CA",
            "license": "20A9664",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Marino, CA

Sources for this page

Verify at the official NPI Registry.