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Joseph E. Barrera MD
Practice accepting new patients.

Joseph E. Barrera MD

(949) 542-8004
Primary Specialties
  • Endocrinology, Diabetes & Metabolism
    (Board Certified)
Medical Groups & Affiliations
  • Mission Heritage Medical Group
  • Mission Hospital Affiliated Physicians

Primary Office

26800 Crown Valley Pkwy.
Suite 230
Mission Viejo, CA 92691
(949) 542-8004
(949) 364-3682
Mon - Fri: 8 a.m. - 4:30 p.m.
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4.9 out of 5 (178 Ratings | 27 Comments)


His visits are like going to a friendly.
Dr. Barrera is a most friendly. kind,great Dr. who takes time to speak about all that I am experiencing and have great understanding of my problems . Gives great input,discuss with me all of my concerns and jointly decides best way of action concerning my therapy. Thank you DR. Barrera I am great full for all your help.
I give *Dr. Barrera 100 points!
Dr. Barrera always spends time Listening and then examining and determining what is best for me. He is the BEST!!!
Dr Barrera is great! The only reason I marked the confidence number down is because I've been struggling with the same unexplained inflammation symptoms for over a year, and we haven't been able to find the root cause. Dr Barrera has referred me to multiple specialists, including GI, Rheumatology, Neurology, Internal Medicine and ENTs and all of these doctors have also found no reasonable answers to why the situation continues. I think my confidence in any provider finding the solution to my problem is waning. However, to clarify, I have complete confidence in Dr. Barrera's ability as an endocrinologist - just starting to feel less than great about the long period of unexplained symptoms and his ability to figure out the mystery.
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Physician Bio

Dr. Barrera's interests include intensive management of diabetes, hypertension and lipid disorders.

He is also involved in the management of prediabetic conditions including metabolic syndrome and polycystic ovarian syndrome.

He has been the principal investigator for numerous clinical trials involving the development of new therapies for diabetes, blood pressure and thyroid cancer. He has lectured extensively to physician colleagues and patient groups in the area of cardiovascular risk management and preventive endocrinology.

Prior to joining Mission Internal Medical Group, Dr. Barrera was the Medical Director of the Diabetes Program at Alta Bates Hospital in Berkeley, California and a team physician for the Oakland Athletics baseball team.

He was also a physician consultant for the KRON and KTVU/Fox news stations in the San Francisco Bay Area.


American Board of Internal Medicine
Board Certified Endocrinology, 1999
American Assosciation of Clinical Endocrinologists
Endocrine Society

Areas of Interest