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Meet the Team

Natural Heart Doctor Practitioners

Dr. Jack Wolfson

Dr. Jack Wolfson DO, FACC

Dr. Jack Wolfson is a board-certified cardiologist, Amazon best-selling author, husband, father, and the nation’s #1 Natural Heart Doctor.

In over twenty years, more than one million people have enjoyed the warmth, compassion, and transformational power of his natural heart health methods.

Dr. Wolfson is the founder of Natural Heart Doctor, the worldwide leader in cardiovascular health. People from all over the world reach out to Dr. Wolfson for holistic heart health consultations.

He has been named one of America’s Top Functional Medicine Doctors and is a five-time winner of the Natural Choice Awards as the Top Holistic M.D. Dr. Wolfson’s work has been covered by more than 100 media outlets, including NBC, CNN, and the Washington Post. His book “The Paleo Cardiologist: The Natural Way to Heart Health” was an Amazon #1 best-seller. He is also a contibuting author to the Textbook of Integrative Cardiology. 

Dr. Wolfson and his wife Heather have four children and are committed to making the world a better place to live. They provide for those in need (including animals) and support natural health causes through their philanthropic efforts.

Dr. James Kneller, M.D., Ph.D., FHRS

Dr. James Kneller is one of the nation’s leading heart rhythm specialists. Dr. Kneller is certified by the American Board of Internal Medicine (ABIM) in Clinical Cardiac Electrophysiology, Cardiovascular Disease, and Internal Medicine.

As a Fellow of the Heart Rhythm Society (FHRS) and Certified Cardiac Device Specialist (CCDS), Kneller provides comprehensive patient care, combining best medical practice with invasive procedures using state-of-the-art technologies to treat heart rhythm disorders.

Beyond guideline-directed therapies, Kneller is passionate about optimized personal health. With a deep interest in complimentary alternative medicine (CAM), he strives to reduce the need for pharmaceuticals, invasive procedures, and exposure to harmful radiation. With Natural Heart Doctor, he strives to help each and every client to Live Well, Eat Well, and Think Well to attain their 100-year heart!

Dr. James Kneller, M.D., Ph.D., FHRS
Dr. Lauren Lattanza, NMD

Dr. Lauren Lattanza, NMD

Dr. Lauren Lattanza is a licensed naturopathic physician, podcast host, public speaker, writer, nature enthusiast, and all-around health enthusiast.

Her goal is to optimize your health and prevent, decrease, or eliminate the need for pharmaceuticals. She will strive to understand your health concerns and treat your unique needs through in-depth conversation, physical exam, and appropriate testing.

Dr. Lattanza is passionate about helping patients find and treat the cause of disease and offering interventions to improve health rather than simply treating symptoms.

When she is not helping patients achieve optimal wellness, she can be found spending time with her husband, Tanner, and her son, Landon, hiking local trails, taking a HIIT class, or tending to her family garden.

Dr. Tonia Rainier, NMD

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. She has more than 20 years of experience as an ACSM-certified Exercise Physiologist.

Outside of her professional life, Tonia enjoys hiking, mountain biking, and exploring paleo cooking.

Dr. Tonia Rainier NMD, MS
Dr. Keith Smigiel, FNP-C, DC, FIAMA

Dr. Keith Smigiel, FNP-C, DC, FIAMA

Dr. Keith Smigiel is a regenerative medicine physician and pain management specialist. He takes an integrative approach to medicine, focusing on customized solutions tailored to individual needs. Using advanced, non-surgical treatments, Dr. Smigiel stimulates your body’s ability to naturally heal itself.

Dr. Smigiel helps people suffering from conditions such as chronic pain and erectile dysfunction, to hair loss and weight gain. Combining treatments such as PRP Therapy, Ozone, Neural Prolotherapy, and IV Infusions with functional rehabilitation, he helps you look and feel better.

He heals the body, instead of just treating the symptoms!

With his professional qualifications as a certified family nurse practitioner, a doctor of chiropractic, and a fellow of the International Academy of Medical Acupuncture, Dr. Smigiel offers patients comprehensive care from a broad perspective of conventional and alternative medicine. He also has extensive experience in functional rehabilitation and chronic pain management.

Dr. Smigiel is married to Angela and has two children, Sophia and Larz. When he’s not busy helping patients, he enjoys hiking, mountain biking, motocross, and boating.

DR. GREG SCHNEIDER, DC

Dr. Greg Schneider is a board-certified chiropractor who worked extensively with athletes at the University of Memphis prior to moving to Arizona.

Dr. Schneider obtained his Doctor of Chiropractic degree from Logan University. Prior to moving to Arizona, he worked for The Joint Chiropractic and CrossFit Memphis.

Dr. Schneider is the perfect solution to eliminating pain without invasive procedures. He uses a variety of chiropractic techniques to reduce pain, lower inflammation and support cardiovascular health. He believes in a holistic approach  health and wellness and spends ample time getting to know you

Dr. Schneider custom develops treatment plans for you to bring long-lasting results and is excited to be part of a medical practice that includes holistic physicians.

DR. GREG SCHNEIDER, DC

Natural Heart Doctor Health Coaches

Ashley Swanson, MS, BS

Education: B.S. in Culinary Science, M.S. in Nutritional Science.

What do you like to do in your free time?
I spend my free time with my fiancé (a chef- we love good Paleo meals), our English creme golden retriever, and my family. We all live close to one another, so we often get together for dinners filled with good food and games. I love road trip adventures, daily sunshine, reading new books, and walking with my dog.

What do you like most about working with Natural Heart Doctor?
My favorite aspect of working for NHD is working with patients and giving them hope. So many patients tell me the best gift they get when they come to NHD is hope, something not given with conventional medicine. Hope to heal naturally without pills or procedures. Once they have hope that their body can heal, they can tackle root cause issues, put the work in, and finally get well.

Ashley Swanson, MS, BS
Lara Hill, CIHC - Natural Heart Doctor Health Coach

Lara Hill, CIHC, F.B.C.A.

Education: AA Business, Certified Integrative Health Coach

What do you like to do in your free time?
I love spending time with my family and friends. I have two adult children that still keep me very busy. I enjoy reading and learning new things in the holistic world and cooking with my husband every night. We love taking daily walks with our mini Goldendoodle, working outside in our garden in the summer, and spending time on the beach or in the mountains — anything to get as much sunshine as possible.

What do you like most about working with Natural Heart Doctor?
I feel blessed every day to work with such a knowledgeable and caring team in a field I am truly passionate about. It’s a privilege to connect with people worldwide and work together to find the root cause of their health issues. I love inspiring and motivating clients/patients to achieve their goals and make long-term changes. I am very grateful to be at Natural Heart Doctor. Here’s to the 100 Year Heart!

Ali Richmond, FNTP, FBCS, BA

Education: BA in English, Certified Functional Nutritional Therapy Practitioner and Functional Blood Chemistry Specialist

What do you like to do in your free time?
Most of my free time is happily spent with my four children and husband. I enjoy reading books about health and fiction novels set in WWII, walking with my two dogs, attending Hotworx classes (working out in a sauna), cooking, gardening (herbs and a few fig trees), and traveling. I live in TX and enjoy the sunshine almost year-round.

What do you like most about working with Natural Heart Doctor?
Everyone at Natural Heart Doctor is passionate about helping others, dedicated, compassionate, and highly knowledgeable. The collective energy is inspiring and will allow us to help everyone worldwide know true health and achieve the 100 Year Heart. I am privileged to be a part of this team and connect with individuals daily to help them achieve their health goals.

Ali Richmond, FNTP, BA
Angeline Karigan-Winter, CHC, MA, BA

Angeline Karigan-Winter, CHC, MA, BA

Education: BA in Sociology, BA in Spanish, MA in Spanish, Certified Integrative Health Coach

What do you like to do in your free time?
In my free time I love to read, spend time outside hiking, camping, and canoeing. I also adore traveling and practicing my foreign language skills. I live in the country with creeks, ravines, bluffs, and caves – my son and I like to go on outdoor adventures! I’m also obsessed with yoga and love to dance.

What do you like most about working with Natural Heart Doctor?
I love working with a team in a clinical setting that truly understands holistic health and practices medicine from this perspective. Everyone here walks the walk, and lives what they recommend to people who work with us. I love talking to people all over the country and world, and offering them hope and a different (and more logical) path toward true health. Being a health coach is a very fulfilling job and a daily mirror of natural, healthy ways of living.

About Dr. Keith Smigiel NP, DC

Dr. Keith Smigiel

Dr. Keith Smigiel is a regenerative medicine physician and pain management specialist. He takes an integrative approach to medicine, focusing on customized solutions tailored to individual needs. Using advanced, non-surgical treatments, Dr. Smigiel stimulates your body’s ability to naturally heal itself.

Dr. Smigiel helps people suffering from conditions such as chronic pain and erectile dysfunction, to hair loss and weight gain. Combining treatments such as PRP Therapy, Ozone, Neural Prolotherapy, and IV Infusions with functional rehabilitation, he helps you look and feel better.

He heals the body, instead of just treating the symptoms!

With his professional qualifications as a certified family nurse practitioner, a doctor of chiropractic, and a fellow of the International Academy of Medical Acupuncture, Dr. Smigiel offers patients comprehensive care from a broad perspective of conventional and alternative medicine. He also has extensive experience in functional rehabilitation and chronic pain management.

Dr. Smigiel is married to Angela and has two children, Sophia and Larz. When he’s not busy helping patients, he enjoys hiking, mountain biking, motocross, and boating.

About Dr. James Kneller, M.D., Ph.D., FHRS

Dr. James Kneller, M.D., Ph.D., FHRS

Dr. James Kneller is one of the nation’s leading heart rhythm specialists. Dr. Kneller is certified by the American Board of Internal Medicine (ABIM) in Clinical Cardiac Electrophysiology, Cardiovascular Disease, and Internal Medicine.

As a Fellow of the Heart Rhythm Society (FHRS) and Certified Cardiac Device Specialist (CCDS), Kneller provides comprehensive patient care, combining best medical practice with invasive procedures using state-of-the-art technologies to treat heart rhythm disorders.

Beyond guideline-directed therapies, Kneller is passionate about optimized personal health. With a deep interest in complimentary alternative medicine (CAM), he strives to reduce the need for pharmaceuticals, invasive procedures, and exposure to harmful radiation. With Natural Heart Doctor, he strives to help each and every client to Live Well, Eat Well, and Think Well to attain their 100-year heart!

About Dr. Lauren Lattanza NMD, FACC

Dr. Lattanza Office Visit with Patient

As a Naturopathic Physician, I am trained to treat the whole person and get to the root cause of disease.

I went to Arizona State University where I graduated with a bachelor’s degree in psychology with a depth in physiology and minor in Spanish. After my undergraduate degree I was working on prerequisite classes towards medical school, which is when I came to learn that my values identified best with the principles of naturopathic medicine. I knew that I wanted to help patients identify the causes of disease and be able to offer treatments which would improve their health rather than simply treating symptoms.

I dedicated the next 4 years to the Southwest College of Naturopathic Medicine in Tempe, Arizona where I attained my Doctorate of Naturopathic Medicine. I served as Class President all 4 years, Board of Trustees – Student Trustee, spoke as the Club President for our branch of Toastmasters, and was voted by my peers and attending physicians to earn the Outstanding Leadership Award for the Class of 2020. Throughout medical school I took it upon myself to work alongside MDs, DOs, chiropractors, and functional medicine practitioners in addition to naturopathic physicians.

As a Spanish speaking student, I was able to volunteer with community clinics around Phoenix and provide free healthcare to low-income families. Due to this combined exposure, I came to find my passion in treating cardiometabolic and digestive disorders that are all too common, yet largely preventable. I took the opportunity to learn the broad spectrum of healthcare so I can ensure that I am able to provide my patients with the best options.

About Dr. Jack Wolfson DO, FACC

Dr. Wolfson Office Visit with Patient

Dr. Jack Wolfson is a board-certified cardiologist, Amazon best-selling author, husband, father, and the nation’s #1 Natural Heart Doctor.

For more than two decades, more than one million people have enjoyed the warmth, compassion, and transformational power of his natural heart health courses and events.

Dr. Wolfson is the founder of Natural Heart Doctor Scottsdale, his heart health practice in Arizona, and Natural Heart Doctor, an online resource center with natural health information. Doctors from across the globe reach out to Dr. Wolfson for training and education in holistic health practices.

He has been named one of America’s Top Functional Medicine Doctors and is a five-time winner of the Natural Choice Awards as a holistic M.D. Dr. Wolfson’s work has been covered by more than 100 media outlets, including NBC, CNN, and the Washington Post. His book “The Paleo Cardiologist: The Natural Way to Heart Health” was an Amazon #1 best-seller.

Dr. Wolfson and his wife Heather have four children and are committed to making the world a better place to live. They provide for those in need (including animals) and support natural health causes through their philanthropic efforts.

Chiropractic

Our chiropractor is an expert at adjustments and holistic chiropractic care and works closely in conjunction with the other health care experts at Natural Heart Doctor.

Call (480) 535-6844 for details and scheduling.

IV Therapy

We use specially formulated natural vitamins and minerals that are injected into a vein to prevent or treat dehydration. Ideal for people in Arizona.

Call (480) 535-6844 for details and scheduling.

Acupuncture

Stimulate your body’s natural healing abilities and promote physical and emotional well-being with acupuncture at Natural Heart Doctor.

Call (480) 535-6844 for details and scheduling.

Health Coaching

Our health coaches use evidence based skillful conversation, clinical interventions, and strategies to engage you actively and safely in health behavior changes.

Call (480) 535-6844 for details and scheduling.

Cardio Tests

We use the most advanced testing in the world to assess heart health and to identify the root cause of your health issues.

Call (480) 535-6844 for details and scheduling.

Office Visits

Schedule an office visit with one of our cardiologists, holistic physicians, chiropractor, or health coaches.

Call (480) 535-6844 for details and scheduling.

Frequently Asked Questions

I’d like to receive an online second opinion from Natural Heart Doctor. What do I do next?

You can initiate a second opinion online through our website at any time. To begin, select the team member you’d like to speak with and open an account.

Click here for cardiologist Dr. Jack Wolfson.

Naturopathic Medical Doctor Dr. Lauren Lattanza. Get details.

Naturopathic Medical Doctor Dr. Tonia Rainier. Get details.

Click here for  Natural Heart Doctor Health Coach.

Alternatively, you can email health@naturalheartdoctor.com. A member of our care team will help guide you through the process of starting a second opinion.

What is the cost of a Natural Heart Doctor Online Second Opinion?

The cost for most second opinions varies by team member. This fee includes information collection, a phone or video consultation, a second opinion from a Natural Heart Doctor specialist and guidance throughout the process from your personal Care Team at Natural Heart Doctor.

Cardiologist Dr. Jack Wolfson’s Second Opinion Fee is $1500.

Holistic Physician’s Dr. Lauren Lattanza’s Second Opinion Fee is $250.

Naturopathic Physician Dr. Tonia Rainier’s Second Opinion Fee is $250.

Note: We apply the Online Second Opinion Call fee as a credit to any future consultations with Natural Heart Doctor, should you choose them.

Will my insurance cover the cost of a Natural Heart Doctor Online Second Opinion?

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.

What is the timeline to receive an online second opinion?

We do our best to schedule your second opinion as quickly as possible. Typically, it takes 5 to 7 business days after your information has been collected to receive your phone or video online second opinion.

What information do you need in advance of our call?

Our office will send you a short questionnaire to complete and return. We DO NOT need your complete medical records.

How many questions can I ask the expert during our call?

You may ask a maximum of five questions. This is to ensure that the expert has sufficient time to devote to each question. All questions must be finalized before your online meeting.

What should I expect to receive once my second opinion is complete?

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.

What if I have follow-up questions for the expert after I have reviewed my second opinion?

If you have a clarifying question about an expert’s response to one of the questions in your second opinion, and the Natural Heart Doctor clinician is unable to address it, then you may request a follow up session for an additional fee. 

Is my medical and payment information secure?

Natural Heart Doctor is strongly committed to protecting the privacy and security of all our patients. Our website meets all federal requirements for protecting personal health information under the Health Insurance Portability and Accountability Act (HIPAA). All financial transactions are processed by Natural Heart Doctor securely using industry standard payment processing tools.

I would rather visit Natural Heart Doctor for an in-person appointment. What should I do next?

If you would prefer an in-person appointment at Natural Heart Doctor instead of an online second opinion, please call (480) 535-6844 for details and scheduling.

Can I schedule a follow up appointment with the specialist who provided my online second opinion?

Yes, we’re happy to help you on an extended basis. Our clinician can discuss options with you when presenting our second opinion summary.