Karun M. Nair, MD

Hospitals where Karun M. Nair works

Medicare's Facility Affiliation Data lists Karun M. Nair at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.

• John Muir Medical Center - Walnut Creek CampusWalnut Creek, CA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 050180

Practice locations

Addresses where Karun M. Nair is enrolled with Medicare (CMS data updated October 2, 2026).

• 120 La Casa Via, Suite 204Walnut Creek, CA 94598 (925) 210‑1050

Group practices

Medicare enrollment lists Karun M. Nair as a member of this group (CMS data updated October 2, 2026).

• Arthritis and Rheumatology Medical Associates Inc6 clinicians in the group

Specialties

• Rheumatologyprimary

Find other Rheumatology doctors in California →

Other rheumatologists in Walnut Creek

Clinicians with the same Medicare primary specialty in Walnut Creek, CA — not a recommendation.

• Zuzana U. Foster, MD
• Midori J. Nishio, MD
• Rashmi B. Dixit, MD
• Anna Khananian, MD
• Chetachi A. Okereke, MD
• Atul Agrawal, MD
• Melissa McNamara, MD
• Vandana D. Sharma, MD

All rheumatologists in Walnut Creek →

Other clinicians in Arthritis and Rheumatology Medical Associates Inc

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

• Zuzana U. Foster, MD
• Rashmi B. Dixit, MD
• David W. Wu, MD
• Saba Ziaee, MD
• Atul Agrawal, 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. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
4. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
5. Medicare Care Compare — official Medicare tool to look up clinicians