Karine Hajyan, DO

Hospitals where Karine Hajyan works

Medicare's Facility Affiliation Data lists Karine Hajyan 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 Karine Hajyan is enrolled with Medicare (CMS data updated October 2, 2026).

• 3 Altarinda Rd, Suite 200Orinda, CA 94563 (925) 254‑9840
• 450 E Romie LnSalinas, CA 93901

Group practices

Medicare enrollment lists Karine Hajyan as a member of these groups (CMS data updated October 2, 2026).

• John Muir Physician Network494 clinicians in the group
• Obstetrix Medical Group of California a Professional Corporation15 clinicians in the group

Specialties

• Obstetrics/Gynecologyprimary

Find other Obstetrics/Gynecology doctors in California →

Other OB-GYNs in Orinda

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

• Angelyn R. Thomas, MD
• Joseph F. Haggerty, MD
• Marilyn M. Honegger, MD
• Sharon K. Knight, MD
• Elisabeth M. Schleuning, MD
• Tiffany L. Perry, MD
• Alexandra L. Haessler, MD
• Cindy Zhang, MD

All OB-GYNs in Orinda →

Other clinicians in John Muir Physician Network

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

• Damara M. Leeman
• Maha B. Toma, MD
• Robin E. McBride, PA
• Rohit Anand, MD
• Ravinder S. Hundal, MD
• Amber L. Yee, 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