HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

FERRIN KATARINA RUIZ, MD

INTERNAL MEDICINE

Medical school: YALE UNIVERSITY SCHOOL OF MEDICINE

Graduated: 2013

Also: PEDIATRIC MEDICINE

NPI: 1477998870

Practice Locations (2)

R. RUIZ MD A PROFESSIONAL CORPORATION

833 W WHITTIER BLVD

MONTEBELLO, CA 906404735

3237124811

RUBEN RUIZ M D A MEDICAL CORPORATION

403 W F ST

ONTARIO, CA 917623207

9099883288

Source: CMS National Downloadable File, September 2026.

FERRIN RUIZ, MD | HealthCareAtlasUSA