Jim S. Chomchai, MD

Practice locations

Addresses where Jim S. Chomchai is enrolled with Medicare (CMS data updated October 2, 2026).

• 1255 W Arrow HwySan Dimas, CA 91773 (909) 394‑2526
• 1336 Bridgegate DrDiamond Bar, CA 91765 (800) 780‑1277

Group practices

Medicare enrollment lists Jim S. Chomchai as a member of this group (CMS data updated October 2, 2026).

• Southern California Permanente Medical Group11,293 clinicians in the group

Specialties

• Psychiatryprimary

Find other Psychiatry doctors in California →

Other psychiatrists in San Dimas

Clinicians with the same Medicare primary specialty in San Dimas, CA — not a recommendation.

• Riteshwar Nath, MD
• Eunjoo Lee, MD
• Rajan L. Iyer, MD
• Helen Bashoura, MD
• Joanna Y. Chuang, DO
• Margaret T. Lin, MD
• Ebonie M. Vazquez, MD
• Craig A. Harris, MD

All psychiatrists in San Dimas →

Other clinicians in Southern California Permanente Medical Group

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

• Ryan M. Kim, DO
• Stephanie N. Du Lin, MD
• Jhon A. Orozco Arismendy, MD
• Fidel F. Herrera, NP
• Shyam Kankotia, MD
• Misty M. Montoya, MD

Clinician information

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

1. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
2. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
3. Medicare Care Compare — official Medicare tool to look up clinicians