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Ronald J. Ruby, MD

Offers Video Visits

Redondo Beach Internal Medicine & Endocrinology

520 N. Prospect Ave., Ste. 200

Redondo Beach, CA 90277

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Accepting New Patients

At Baltimore City Hospitals, Dr. Ruby performed his internship and residency. He became the Chief Medical Resident and a fellow at Johns Hopkins Hospitals. His fellowship training in endocrinology was at Harbor UCLA where he was the Chief Resident. Fellowship interest were in diabetes, obesity, and thyroid disease.

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 on the board of directors for the South Bay Independent Medical Group. He was the chief of staff at South Bay Hospital. Currently serving as director of the medical education at Providence Little Company of Mary. 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. His last publication was in the international journal The Lancet-Diabetes & Endocrinology in October 2018 called STOP DIABETES.

Education & Experience


Medical School

University of Texas 1973


John Hopkins Bayview Medical Center


John Hopkins Bayview Medical Center


Harbor UCLA Medical Center

Associations & Certifications

Board Certifications

American Board of Internal Medicine, Endocrinology Diabetes and Metabolism

American Board of Internal Medicine, Internal Medicine

Insurances Accepted

  • United HealthCare PPO
  • TriCare (TriWest) PPO
  • Oscar PPO
  • Health Net of California PPO
  • First Health PPO
  • Coventry Health Care PPO
  • Cigna Healthcare PPO (No Local Plus)
  • ChoiceCare-Humana PPO
  • Blue Shield of California PPO
  • Blue Cross of California PPO
  • BeechStreet PPO
  • Aetna US Healthcare PPO
  • Multiplan PPO
  • Aetna HMO
  • United Healthcare Medicare Advantage
  • SCAN Medicare Advantage
  • Humana Medicare Advantage HMO
  • Health Net Medicare Advantage
  • Clever Care
  • Cigna HMO
  • Blue Shield of CA Medicare Advantage
  • Blue Shield of CA HMO – Trio
  • Blue Shield of CA HMO
  • Anthem Blue Cross Medicare Advantage
  • Anthem Blue Cross HMO


Redondo Beach Internal Medicine & Endocrinology

(310) 374-7655

520 N. Prospect Ave., Ste. 200

Redondo Beach, CA 90277

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Affiliated Locations

Providence Little Company of Mary Medical Center - Torrance