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

RONALD J RUBY, MD

ENDOCRINOLOGY

Medical school: UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS

Graduated: 1973

Also: INTERNAL MEDICINE

Offers telehealth

NPI: 1568475044

Practice Locations (3)

PROVIDENCE MEDICAL INSTITUTE

LAGUNA NIGUEL, CA 92677

PROVIDENCE MEDICAL INSTITUTE

2801 ATLANTIC AVE

LONG BEACH, CA 908061701

5629332000

PROVIDENCE MEDICAL INSTITUTE

520 N PROSPECT AVE

REDONDO BEACH, CA 902773042

Source: CMS National Downloadable File, September 2026.

RONALD RUBY, MD | HealthCareAtlasUSA