Revitalize Functional Medicine is located in Paradise Valley Arizona and has been since 1996. We provide preventative as well as acute and chronic care to patients seeking to achieve their optimal state of wellbeing.


We believe:

  • Medicine should be focused on the patient, not on paperwork
  • Doctors and patients are partners in wellness
  • Visiting the doctor should be as painless as possible

Our medical professionals work with our patients to determine individualized treatments. We provide options that range from traditional western medicine and the use of pharmaceuticals to natural therapies such as acupuncture, chelation therapy (a natural detox process), hormone therapy, homeopathy, and herbal medicine.

Expect a non-judgmental, open, safe, confidential, health care center visit.

Opened in March 2013, our 1,800 sq. ft. office provides a modern, comfortable, and private environment like no medical office you’ve ever experienced. Men don’t like to go to the doctor, so we designed a space that feels more like a living room than a medical office. From the waiting room decked out with a flat screen TV and big, comfortable leather chairs, to the state-of-the-art exam rooms and IV area with plush leather recliners, our goal is to make you feel at home.


Dr. John Tidwell is Opt Health’s Chief Medical Officer. As an orthopaedic trauma surgeon, Dr. Tidwell quickly discovered the lack of emphasis that conventional medicine places on preventing disease. Why treat diseases when we can prevent them altogether?

This insight led Dr. Tidwell to seek out a BHRT certification from the Academy of Preventive and Innovative Medicine as well as training from the American Academy of Anti-Aging Medicine. So when childhood friend Camilo Isaza (Opt Health’s co-founder and CEO) reached out for help with a telemedicine platform focusing on men’s wellness and preventive medicine, Dr. Tidwell was immediately on board.

Dr. Tidwell graduated from Georgia Tech at the top of his class with a degree in engineering before discovering and pursuing orthopaedics, a field of medicine that merges engineering with human physiology.

After graduating from the Medical College of Georgia at Georgia Regents University in 2008, Dr. Tidwell completed his residency at West Virginia University Hospitals and an orthopaedic trauma fellowship at Penn State’s Milton S. Hershey Medical Center. From 2015 to 2017, Dr. Tidwell served as a clinical instructor of orthopaedic surgery for Community Regional Medical Centers in Fresno, California.

Besides his work as a surgeon, Dr. Tidwell has contributed extensively to research in the field of orthopaedics, with papers appearing in Injury, the Journal of Orthopaedic Trauma, and the American Journal of Orthopaedics. He has also given lectures on his work throughout North America.


Dr. Christina Kovalik NMD, LAc, is a Naturopathic Medical Doctor, Acupuncturist, Hormone Optimization Expert and Aesthetic-Anti-aging Specialist in Scottsdale and Flagstaff, Arizona. Her clinic, The Vitality Doctor, is a family medical practice with a special interest in optimizing hormone imbalance and longevity medicine for men and women. She assists many patients with fatigue, depression, anxiety, thyroid imbalances, adrenal issues, infertility, PMS, menstrual irregularities, pregnancy & postpartum support, menopause, andropause, aesthetics and hormone imbalance for men and women.

Dr. Brandon Chastant began his medical career after graduating Magna Cum Laude with a Bachelors of Science in Nursing from Arizona State University. He gained experience in every facet of hospital patient care, specializing in Cardiac ICU, Telemetry, and the Emergency Department. He earned his Masters of Science in Integrative Healthcare between assignments working as a traveling nurse in the ICU in Arizona, Montana, Tennessee, South Carolina, and Hawaii. He graduated with Top Academic Honors from Southwest College of Naturopathic Medicine and has practiced as an Integrated Naturopathic Physician specializing in Men’s Health including Testosterone Therapy, Women’s Health including Bioidentical Hormone Replacement Therapy and Thyroid disorders, as well as effectively treating acute and chronic illnesses with IV Therapies.

Dr. Chastant is board certified completing his Fellowship in Naturopathic Cardiology under the tutelage of Dr Decker Weiss, NMD, FASA; he is the third Naturopathic physician to achieve this designation. He has trained physicians (MD, DO, NMD) around the country in Men’s Health treatments of low testosterone, erectile dysfunction, and prostate issues. Dr. Chastant has participated in numerous medical missions serving poor, remote communities in Honduras, Nepal, Mexico, and Rio de Janeiro, Brazil.

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