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Dr. John Duffy, MD

Dr. John Duffy, MD

Age 58 Psychiatry M
(5) 5 reviews


Dr. John Duffy, MD is a psychiatry specialist in Santa Ana, CA. He currently practices at John Gregory Duffy, MD and is affiliated with Chapman Global Medical Center.


  • Georgetown University / School of Dentistry, Medical School — 1994

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Oct 02, 2018
In October 1999, my bipolar 55 year old father experienced a massive stroke and was not expected to survive. The emergency treatment team focused on stabilizing my father medically, but dumped him completely off all of his psych meds. Long story short, Dr. Duffy visited my father at a local nursing home and offered to transfer him to a geriatric psych unit so that he could help stabilize my father mentally. Dr. Duffy helped my father to live 2 1/2 more years with a much better quality of life.
Ann Ashcraft Masangcay in Yucaipa, CA — Oct 02, 2018
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Frequently Asked Questions

Dr. Duffy frequently treats ADHD and-or ADD, Psychological Evaluations Prior to Bariatric Surgery , and Psychiatric Evaluation.  

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Hospital Affiliations

  • Chapman Global Medical Center


  1. John Gregory Duffy, MD

    1. 1
      Raa-apex Acquisition LLC
      1401 N Tustin Ave Ste 130, Santa Ana, CA 92705 (714) 542-3617