During his residency, Dr. Ruby served as chief medical resident and his fellowship training focused on diabetes, thyroid disease and obesity. He is a charter member and fellow of the American Association of Clinical Endocrinologists and a member of the National Lipid Association, American Diabetes Association and the Endocrine Society. He has been in the South Bay since 1980 practicing Internal Medicine and Endocrinology.

Dr. Ruby has served as the medical director and board of directors for the South Bay Independent Medical Group and the chief of staff at South Bay Hospital. His current clinical research involves early diagnosis and treatment of pre-diabetics and recognition of premature vascular disease. Dr. Ruby is a published author and serves as a national speaker for osteoporosis.

He is a lifelong sports enthusiast, plays paddle tennis and has a great interest in photography. His wife, two sons and two grandchildren remain the primary focus of his busy and productive lifestyle.

Medical School
  • University of Texas Southwestern Medical Center, Dallas, TX
  • Johns Hopkins Hospital (F/K/A Baltimore City Hospitals), Baltimore, MD
  • Johns Hopkins Hospital (F/K/A Baltimore City Hospitals), Baltimore, MD
  • Harbor UCLA Medical Center, Torrance, CA
  • English


Providence Medical Institute
520 N. Prospect Avenue
Suite 200
Redondo Beach, CA 90277
(310) 374-7655
(310) 372-7026


  • Endocrinology (Board Certified)


Insurances Accepted
  • Aetna PPO/POS/EPO
  • Blue Cross/Blue Shield PPO
  • Cigna PPO/POS/EPO
  • Covered CA Anthem BC HMO
  • Covered CA Anthem BC PPO/EPO
  • Covered CA Blue Shield HMO
  • Covered CA Blue Shield PPO/EPO
  • Covered CA Health Net PPO
  • Covered CA LA Care HMO
  • Health Net PPO/EPO/POS
  • Medicare
  • MultiPlan LTD PPO
  • Providence Medical Associates
  • Tricare PPO
Insurance Medical Groups
  • Axminister Medical Group/IPA
  • HealthCare Partners Medical Group

Medical Groups

Affiliated Medical Groups
  • Providence Medical Associates