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John M. Gilbert MD
Practice accepting new patients.

John M. Gilbert MD

(714) 446-5640
Primary Specialties
  • Endocrinology, Diabetes & Metabolism
Secondary Specialties
  • Internal Medicine
Medical Groups & Affiliations
  • St. Jude Affiliated Physician
  • St. Jude Heritage Medical Group

Primary Office

100 E. Valencia Mesa Dr., Suite 105
Fullerton, CA 92835
(714) 446-5640
(714) 446-5468

Physician Bio

A love of teaching and a desire to help people live happier and healthier lives inspired me to become a physician. I care for the person as well as the disease, and my work in clinical research trials ensures patients have access to the newest treatment options. Over the years I have found that successful treatment is a result of working in partnership with my patients. Together, we can prevent a variety of conditions and related complications, as well as achieve a healthier lifestyle.

To further advance the treatment of endocrine disorders, I serve as Medical Director of Clinical Trials at St. Jude Heritage Healthcare, speak nationally on the latest innovations, and participate on St. Jude Medical Center’s committee to improve diabetes care.


  • Medical School:
    Downstate Medical School - New York, NY
  • Internship:
    St. Mary's Hospital - Rochester, NY
  • Residency:
    St. Mary's Hospital - Rochester, NY
  • Fellowship:
    State University of New York at Stonybrook - New York, NY
  • Board Certified in Endocrinology, Diabetes & Metabolism
  • Board Certified in Internal Medicine

Areas of Interest

  • Adrenal Disorders
  • Diabetes
  • Hyperlipidemia
  • Hypertension (High Blood Pressure)
  • lipid management
  • Menopause
  • Metabolism
  • Obesity
  • Osteoporosis
  • Weight Management
  • Thyroid
  • Adrenal and Pituitary Disorders
  • Sex Hormone Disorders
  • Hypogonadism
  • Hypoglycemia
  • Hypercalcemia
  • Hypocalcemia
  • Hyperparathyroidism
  • Acromegly
  • Cushing's Syndrome

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