Quick answers
- Does Warren R. Christianson Ii accept Medicare assignment?
- Yes. Medicare's clinician data says Warren R. Christianson Ii accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Warren R. Christianson Ii's NPI number?
- 1932359445. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Warren R. Christianson Ii is enrolled with Medicare (CMS data updated October 2, 2026).
- 1000 Vale Terrace DrVista, CA 92084 (760) 631‑5000
- 2400 Mission StSan Marino, CA 91108 (626) 403‑8999
Group practices
Medicare enrollment lists Warren R. Christianson Ii as a member of these groups (CMS data updated October 2, 2026).
- Vista Community Clinic44 clinicians in the group
- San Marino Psychiatric Associates Inc7 clinicians in the group
Specialties
- Psychiatryprimary
Other psychiatrists in Vista
Clinicians with the same Medicare primary specialty in Vista, CA — not a recommendation.
Other clinicians in Vista Community Clinic
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2004 (22 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1932359445 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians