Ronald J. Ruby, MD

Accepting New Patients
Offers Video Visits
520 North Prospect Avenue, Suite 200
Redondo Beach, CA 90277
2284.2 miles away
Medical Groups & Affiliations
Providence Axminster Medical Group
Speaks: English

Providence Medical Institute - Redondo Beach Internal Medicine & Endocrinology

520 North Prospect Avenue, Suite 200, Redondo Beach, CA 90277

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About Ronald J. Ruby

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.


Harbor UCLA Medical Center


John Hopkins Bayview Medical Center


John Hopkins Bayview Medical Center

Medical School

University of Texas

Board Certifications
  • American Board of Internal Medicine, Internal Medicine
  • American Board of Internal Medicine, Endocrinology Diabetes and Metabolism
  • American Board of Internal Medicine, Endocrinology and Metabolism
Providence Medical Institute - Redondo Beach Internal Medicine & Endocrinology
520 North Prospect Avenue, Suite 200
Redondo Beach, CA 90277

Medical Groups & Affiliations
Providence Axminster Medical Group

Affiliated Locations
Providence Little Company of Mary Medical Center Torrance

Clinical Interests

  • Abnormal Cortisol Level Tests
  • Abnormal Glucose
  • Abnormal Glucose Metabolism
  • Addison's Disease
  • Adrenal Adenoma
  • Adrenal Disorders
  • Adrenal Mass Non Malignant
  • Adrenal Neoplasm
  • Adrenogenital Syndrome
  • Androgen Excess
  • Androgen Insensitivity
  • Calcium Metabolism
  • Carcinoid Syndrome
  • Cardiovascular Disease
  • Congenital Hypothyroidism
  • Conn Syndrome
  • Cushing Syndrome
  • Diabetes Education
  • Diabetes Mellitus
  • Ectopic Hyperparathyroidism
  • Endocrine Disorders
  • Feminizing Syndrome
  • Fine Needle Aspiration Of Thyroid
  • Glucagonoma
  • Glucocorticoid Deficiency
  • Goiter
  • Grave's Disease
  • Growth Disorders
  • Growth Hormone Abnormalities
  • Growth Hormone Deficiency
  • Gynecomastia
  • Hashimoto Thyroiditis
  • Hyperaldosteronism
  • Hypercalcemia
  • Hypercholesterolemia
  • Hyperglycemia
  • Hyperglycemic Hyperosmolar Syndrome
  • Hyperparathyroidism
  • Hyperthyroidism
  • Hypocalcemia
  • Hypoglycemia
  • Hypogonadism
  • Hypoparathyroidism
  • Hypopituitarism
  • Hypothalamic Pituitary Disorder
  • Hypothyroidism
  • Insulin Pump
  • Insulin Resistance
  • Insulin Therapy
  • Insulinoma
  • Low Blood Sugar
  • Metabolic Bone Diseases
  • Metabolic Syndrome
  • Multiple Endocrine Neoplasia
  • Myxedema
  • Nodular Goiter
  • Non Toxic Goiter
  • Osteopenia
  • Osteopetrosis
  • Osteoporosis
  • Panhypopituitarism
  • Parathyroid Disease
  • Parathyroid Hyperplasia
  • Pheochromocytoma
  • Pituitary Adenoma
  • Pituitary Disorders
  • Pituitary Tumor
  • Primary Hyperparathyroidism
  • Pseudohermaphroditism
  • Pseudohypoparathyroidism
  • Radioiodine Therapy
  • Rickets
  • Secondary Hyperaldosteronism
  • Thyroid Cyst
  • Thyroid Disorder
  • Thyroid Hormone Resistance
  • Thyroid Nodule
  • Thyroiditis
  • Thyrotoxic Exophthalmos
  • Thyrotoxicosis
  • Toxic Diffuse Goiter
  • Toxic Nodular Goiter
  • Type 1 Diabetes
  • Type 2 Diabetes
  • Uremic Hyperparathyroidism
  • Virtual Care
  • Vitamin Deficiency