Sigfredo Villarin Ayala, MD

Hospitals where Sigfredo Villarin Ayala works

Medicare's Facility Affiliation Data lists Sigfredo Villarin Ayala 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.

• Northridge Hospital Medical CenterNorthridge, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050116

Practice locations

Addresses where Sigfredo Villarin Ayala is enrolled with Medicare (CMS data updated October 2, 2026).

• 18300 Roscoe BlvdNorthridge, CA 91325 (818) 998‑8591

Group practices

Medicare enrollment lists Sigfredo Villarin Ayala as a member of these groups (CMS data updated October 2, 2026).

• Compassionate Critical Care Group, Inc.14 clinicians in the group
• Northridge Trauma Surgeons Inc a Medical Corporation13 clinicians in the group

Specialties

• General Surgeryprimary

Find other General Surgery doctors in California →

Other general surgeons in Northridge

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

• Joseph A. Karam, MD
• Marissa A. De Freese, MD
• Rahim Aimaq, MD
• Uthaiah Kokkalera, MD
• Sheliza Kabani, MD
• Dantae D. Davies, MD
• Shawki D. Saad, MD
• Stephen A. Dada, MD

All general surgeons in Northridge →

Other clinicians in Compassionate Critical Care Group, Inc.

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

• Hamid R. Nasseri, DO
• Neha Mehta, DO
• Mehrnaz Hadian, MD
• Sheliza Kabani, MD
• Gary K. Kong, MD
• Norair Adjamian, DO

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