Naturopathic Medical Doctor
Dr. Tonia Rainier
Virtual Second Opinion Service
Here’s How It Works

Tell Us How We Can Help You
Tell us online about you and your needs. Fill out a brief medical history to get started. Dr. Rainier will review your situation prior to the call.
Get Answers and Guidance
Get answers about any heart condition. No matter what your medical condition, Dr. Rainier is available from wherever you are by phone or video.


Get a Second Opinion
Get a review of your condition from Dr. Tonia Rainier, the guidance to move forward, and the peace of mind that comes from talking to an expert committed to you. Dr. Rainier is here to help you get better.
Outcomes You Can Expect
During the meeting, ask up to five questions. This gives Dr. Rainier sufficient time to devote to each question. You’ll get answers and have her full attention.
After the meeting, you will receive a summary of our discussion along with our second opinion. The second opinion will be in written form. After you have reviewed the second opinion, a Natural Heart Doctor clinician will follow up with you by phone to address general medical questions about the information provided in the second opinion.
Have more questions? Get answers here.

Answers to Common Questions
Tonia Rainier, NMD is a is an Arizona board-certified Naturopathic Physician. She obtained her doctorate from Sonoran University of Health Sciences in Tempe, AZ, and has pursued advanced training in Functional Medicine(IFM.org), including completion of the Institute for Functional Medicine's "Applying Functional Medicine in Clinical Practice" (IFM-AFMCP) program, as well as the "Hormone Advanced practice module" (APM) and the "Gastro-Intestinal APM". With a solid foundation in Naturopathic Medicine and specialized expertise in Functional Medicine, Tonia provides a distinct approach to patient care. Her focus is on identifying the cause of health issues through root-cause medicine, herbal medicine, and nutritional therapy.
In addition to her naturopathic qualifications, Tonia holds a master's degree in Exercise Science and a bachelor's degree in Wellness Promotion. With over 20 years of experience as an ACSM-certified Exercise Physiologist, she is a master in developing personalized wellness, nutritional, and lifestyle plans for her patients. Finally, the physician you really can ask for all your exercise and nutrition inquiries.
Her areas of specialization include adrenal, thyroid, hormonal, metabolic, and gut dysfunction. Tonia follows a food-first approach to healing and emphasizes the importance of correcting lifestyle factors to achieve significant improvements in overall health. Her philosophy integrates the best aspects of Naturopathic Medicine and Functional Medicine to delve into the root causes of dysfunction. By evaluating key pillars of health such as nutrition, digestion, sleep, stress, and movement, she pinpoints areas that require attention. She also uses cutting-edge specialty labs to investigate further and utilizes a functional medicine lens, rather than disease parameters used by conventional medicine. If you are committed to investing in your health, Tonia is ready to support you throughout your wellness journey as a team.
Dr. Rainier's fee includes information collection, a 20-minute phone or video consultation, a second opinion based upon your supplied information and discussion, and guidance throughout the process from your personal Care Team at Natural Heart Doctor. Naturopathic Medical Dr. Tonia Rainier's Second Opinion Fee is $250.
We are happy to help people located anywhere in the world if we can communicate in English.
Most likely, no. Most health plans do not cover online second opinions or consultations. You are responsible for the cost of our second opinion. Natural Heart Doctor cannot file a claim with your insurance carrier, nor can we provide a procedure (CPT) code for this service.
Yes, we can. We often will not though on these 2nd opinion calls.