Thank you for your interest in Functional Medicine...Due to my current extensive waitlist, I will not be accepting new patient requests at this time. I will re-open new patient requests once I have addressed the needs of those patients on the current wait list.


I am so thankful that I found Dr. O’Brien. She has truly changed my life for the better. Dr. O’Brien is an amazing listener, which is essential in functional medicine. Instead of trying to treat my symptoms, she got to the root causes of my health problems. I spent 3 hours with Dr. O’Brien at my first visit. She listened to every aspect of my life and connected so many health issues that I always thought were unrelated. Turns out they weren’t unrelated at all. I have referred so many family and friends to Dr. O’Brien – including my chiropractor. I haven’t felt this good in years, and I owe it all to Dr. O’Brien.


Frisco, TX

When I arrived on Dr. O’Brien’s doorstep I was battling with extreme insomnia, mental fog and physical exhaustion. This wasn’t the first time I was on this merry-go-round. I had been to doctor after doctor over the years and no one ever able to determine the cause. The best they could offer me was temporary relief from the symptoms. In my first visit to Dr. O’Brien she was able to provide a preliminary diagnosis which was later confirmed by the labs and genetic testing. For the first time in my life I feel like I am on the road to recovery. Dr. O’Brien is truly practicing cutting-edge 21st century medicine with her intimate knowledge of how the body functions combined with recent advances in understanding the human genome. Her insights and skill are truly worth their weight in gold.


Allen, TX

Dr. O’Brien listened to me and all my issues and was able to design a plan to tackle them all in stages. I was really sick with so many gastrointestinal issues. I feel so much better since I began on her treatment plan to address my many food intolerances and vitamin deficiencies. We have a long way to go on this journey together, but I know she will be my champion every step of the way. She always encourages me when I feel like I’m not getting better fast enough and reminds me of just how far I’ve come. I owe her my life literally as I felt like I didn’t have one anymore when I came to her for help….


I’m 24 years old and one year ago I was in the worst shape of my life…..I feared everyday was almost my last. My anxiety was uncontrollable. I had rashes developing on various parts of my body. I had constant tremors. I could only exercise for mere minutes before passing out and my joints all ached with arthritis like an old man.

Today, one year later I can say that I am 90% better overall and continue to get better and stronger everyday.

Dr. O’Brien saved my life….I now have the tools and the wherewithal to live the rest of my life knowing how my body functions and how I need to live in order to live a long, healthy and satisfying life.


Frisco, TX

Dr. O’Brien is a true Godsend for me. I had been searching for years to find a doctor that would listen to my concerns and partner with me to find answers and Dr. O’Brien has done that and more. I feel better than I have in years. She truly is a blessing for me and my family.


Gunter, TX

I had tried weight loss surgery, every diet out there and the last 3 years I have eaten clean, no sugar no processed foods and quit the diet drinks. No matter what I did I could not feel better nor could I loose weight! Dr. O’Brien was recommended to me by my counselor and what a heaven sent that day was. The test results have been a bit overwhelming, but I am following this journey for my overall health and the next chapter in my life. The little bit of weight I have started loosing is a bonus. I know the weight will start coming off the further we get into this, but I am actually starting to feel much better, getting some of my focus back and the energy Im used to having. I have learned so much from Dr. O, way more then I actually understand, but she makes sure you know what you are doing and why! I am able to guide my family better because of what she has taught me. To say she is a blessing is putting it mildly. Thank you Dr. O!


Celina, TX

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