About Sean Breen, D.O.

Irvine Bioidentical Doctor Sean Breen, D.O.
Sean Breen, D.O.

Irvine Bioidentical Hormone Doctor, Sean Breen, D.O. is a graduate of the New York College of Osteopathic Medicine in Old Westbury, New York. Following medical school, he was awarded a United States Navy Heath Professions Scholarship and completed his post-graduate training at the prestigious Naval Medical Center San Diego located in San Diego, California.

During his 9-year career as a Navy medical officer, he spent 4 years as a battalion surgeon with the 1st Marine Division at Camp Pendleton, California.In 2003, he deployed to Iraq in support of Operation Iraqi Freedom (OIF-1) as the battalion surgeon for 1st Battalion 4th Marines. He was in charge of 65 Navy Corpsman and responsible for the health of 1000 United States Marines.


During his 9-month deployment, he was embedded with the Marines on the front lines directly in combat. Doctor Sean Breen was awarded a Navy and Marine Corps Achievement Medal with Valor for his actions on April 8, 2003 for taking care of a fallen Marine in a section in Baghdad called Saddam City. Upon returning from combat in September of 2003, he continued to serve with the Marine Corps, as the battalion surgeon for 1st Combat Engineer Battalion and was promoted to be the 11th Marines Regimental Surgeon. He was honorably discharged from the Navy in 2006 after being promoted to the rank of Lieutenant Commander.

Following his decorated military career, Doctor Sean Breen shifted his focus to preventative medicine. Already proficient in osteopathic and cranial-sacral manipulation, he went on to earn a degree in Medical Acupuncture from the Helms Medical Institute at the David Geffen UCLA School of Medicine. He is currently a fellow with the American Academy of Anti-Aging, and he received board certification in Anti-Aging, Functional, and Regenerative Medicine in December 2012. In addition, he became an expert in Bioidentical Hormone Therapy after training with Doctor Neal Rouzier, who is world renowned for his work and research in Natural Hormone Replacement Therapy. He is currently completing a Masters Degree in Metabolic and Nutritional Medicine at the University of South Florida Medical School.

Doctor Breen’s clinic is the premier medical clinic in preventative, functional, and regenerative medicine in the South California areas of Orange County and Irvine, California. Doctor Sean Breen’s goal is to restore optimal health and prevent disease before it becomes symptomatic.  He has developed an annual health plan that walks patients step by step through the healing process over an entire year. Each patient receives a customized health plan designed to restore the body’s natural hormones to levels they had when they were 20 years old. In addition, patients receive a customized nutrition plan based on their specific physiology, biochemistry, and nutritional status. Lastly, he uses the latest scientific technology based on pier reviewed medical literature to help patients break free of the current medical model, which is treating symptoms with drugs while failing to address the underlying or root cause of the disease.

In addition, Doctor Sean Breen played Division-1A baseball as a pitcher for Iona College. He was a first team academic All-American in his junior and senior years and was a NY State College All-Star in 1996. He was also named team captain in his senior year. His passion for athletics continuous, and he has been an active member of the Cross Fit community since 2009. He is passionate about helping athletes achieve peak performance by avoiding over training and identifying injury depletions.

Personally, Doctor Breen is most proud of his role as father to his son Jack, who is age 1, and he is a devoted husband to his wife Erin. They currently reside in the city of Orange, California. Doctor Breen is an active member of Pacific Pointe Church located in Irvine, California.

Three years ago I met Dr. Breen at a seminar provided by my gym.  He gave an insightful presentation on how hormones, eating correctly, and taking the right supplements can play a huge role in your fitness goals.  I first sent my husband to see Dr. Breen due to his lack of energy and general issues associated with being in your late 40’s.  His General Practitioner told him that all of his levels were “normal.”  Personally, I don’t think being on the low end of the spectrum is considered normal.  His overall health and stamina is amazing since becoming a patient.

After seeing the positive changes in my husband, I too decided I would get checked out my Dr. Breen.  After discovering some thyroid issues, my energy, physical performance, and leanness are where they should be.  Dr. Breen’s personal program has helped me to make gains in the gym (I’m a cross-fitter), help me with my eating habits, and my overall health.

Dr. Breen has an amazing bedside manner.  He actually listens when you talk to him, he remembers things you’ve said in past appointments, and genuinely cares about your health.  His goal is to have each of their patients at their optimum levels.

Regardless of your age (I’m 34 and my husband is 50) – Dr. Breen can help to fine tune your health goals.  My husband and I are both in the best shapes of our lives, physically and internally, and that’s all thanks to Dr. Breen.

Christie C.

This review is long overdue. I’ve been seeing Dr. Breen just under a year and I wanted to wait until I had been under his care long enough to give a full review. When I came to Dr. Breen I had low energy, was extremely overweight and just felt horrible. After a comprehensive battery of blood tests and over a two hour review with the doctor I was devastated at how I had let myself go. Based on the tests I was well on my way to an early heart attack. I’m not even 35 yet, so needless to say it was extremely scary to hear that I was in such poor health.

Dr. Breen immediately told me what I needed to do to get back to a healthy weight and lower my risk of a heart attack. He put me on a bunch of supplements, got my hormone levels in check and gave me a nutrition and exercise plan that has worked beyond my expectations! It’s been less than a year and I feel like a brand new person, I have energy to play with my kids and I feel great. I’ve lost over 50 pounds and can now wear a size 30 waist! I went from over 40 percent body fat down to 13 percent! When I had questions for the doctor he was always accessible and even lets you text him on his personal cell after hours. This is true concierge service. I can’t thank Dr. Breen and his team enough for all they have done for me. My wife was so thrilled will my results she has now gone to see him as well. Thanks Dr. Breen for giving me my life back!

Jamie M.

Dr Breen has a very specialized practice.  To get a doctor who thinks outside of the box and who is personally avalable to you 24/7 it can be expected to pay a little more. Also insurance fails to cover preventative and anti aging type of care. I am an RN and personally have been in dr breen’s program and have had excellent results. I look and feel better and I am very thankful for doctors like Dr Breen.

If you’re having issues with hormone balance or weight gain or really any type of health issue it would certainly be worth giving dr breen a try.

Vincent C.

To learn more about receiving a specialized Bioidentical Hormone Replacement Therapy program, contact Irvine Bioidentical Doctor, Sean Breen, D.O. in the Orange County and Irvine, California area today to schedule a consultation!