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We are devoted to your care Center for Fully Functional Health

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We are listening, and we will not give up.

“Almost” is never good enough then it comes to your health. Our team is committed to partnering with you on your journey to optimal wellness. The Center for Fully Functional Health (CFFH) was founded in 2011 by husband-wife physicians Dr. Ellen and Dr. Scott Antoine. Their mission is to identify and treat the causes of chronic illness so that patients can reclaim their energy and wellbeing. The CFFH team believes that healthcare should always be personalized according to your own individual history, lifestyle, and needs. Your symptoms are real, your concerns are valid, and there is always hope.

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Dr Ellen Antoine

Dr. Ellen Antoine


Dr. Ellen has been a physician for over 26 years. She is dual board certified in Emergency Medicine and Integrative Holistic Medicine, as well as certified in Functional Medicine, producing a unique skillset that allows her to quickly identify symptoms and their potential causes, while also applying her in-depth knowledge of the connections between multiple systems and their functions.

Dr. Ellen practiced and taught Emergency Medicine for 12 years before becoming one of the first 100 practitioners in the nation to be certified by the Institute of Functional Medicine. She shifted her focus to integrative health after she and her children received a series of difficult diagnoses. Unsatisfied with the treatment offered by traditional medicine, she created a custom plan that helped her conquer her own lupus, as well as change the outcomes for her family. She is committed to bringing peace and health to her patients and their loved ones.

Dr Scott Antoine

Dr. Scott Antoine


Dr. Scott has been a physician for over 27 years. He is triple board certified in Emergency Medicine, Integrative Holistic Medicine, and Metabolic, Nutritional and Functional Medicine.

He served as an active duty Army Emergency Physician for 7 years, including roles as Ambulance Service Medical Director and Chief of the Emergency Departments for both Fort Gordon and Fort Knox.

Dr. Scott joined his wife at The Center for Fully Functional Health full-time after recognizing the life-changing opportunities afforded by a whole-body approach that moves beyond the limits of traditional evidence-based medicine and band-aid treatment plans.

He is passionate about helping patients live a healthy, active, joy-filled life by creating individualized, patient-centered solutions to prevent and treat chronic illness.

Kathleen Sievert, FNP-C

Kathleen Sievert, FNP-C

Nurse Practitioner

Kathleen joined the CFFH team as a board-certified Nurse Practitioner after graduating from the IUPUI Nurse Practitioner program. However, her history with our practice stretches back many years, when she first came in her teens as a patient. (You can read her story here.) Her experience with Dr. Ellen was so life-changing that Kathleen made the decision to pursue formal medical training. She is not only a success story herself, but an amazing patient advocate and clinician.

Grace Horrall, PA-C

Grace Horrall, PA-C

Physician Assistant

Grace is a board-certified Physician Assistant who joined CFFH in 2021 after graduating from the Wingate University PA program. After years working in the traditional healthcare system, she was thrilled to transition to a more holistic approach that focuses on whole-human, personalized care. She has thrived since her arrival, supporting our pediatric and PANS/PANDAS patients, as well as adult Focus Appointment and Free Climb DPC patients.

Heather Hartung

Heather Hartung

Health Coach

Heather is dual certified in both Health Coaching and Functional Nutrition and has been a Health Coach for 10 years. She trained through the Institute for Integrative Nutrition and Functional Nutrition Alliance and helps CFFH patients refine their diet and lifestyle, with a special focus on customized recipes and meal planning. She has experienced the benefits of an integrative approach firsthand, and she enjoys empowering others to make healthier nutrition and lifestyle choices so they can live Fully Functional lives.

Katie Wells

Katie Wells

Health Coach

Katie earned her degree in Nutritional Counseling and certification in Health Coaching from Trinity School of Natural Health. While she is the newest Health Educator for CFFH, she has been an incredible asset to the practice since 2016 and has made Functional & Integrative Medicine a way of life. She specializes in coaching Focus Appointment and Free Climb DPC patients.

Shelli Andrews, RN

Shelli Andrews, RN

Health Coach

Shelli is certified in Whole Health Education and Whole Health Coaching for Nurses by the National Institute for Whole Health. She has also been a Registered Nurse for over 20 years and had the opportunity to work in a variety of different settings, including hospitals, schools, and international public health. She is a passionate advocate for personalized functional and integrative medicine and supports both adult and pediatric patients at CFFH.

We specialize in finding answers when no one else can.

Taking charge of your own health journey requires courage, faith, and teamwork. The Center for Fully Functional Health team offers the support and resources you need to optimize your health and change your life. If the symptoms below apply to you, we can help:

  • Brain Fog or Trouble Focusing
  • Chronic Diarrhea or Constipation
  • Chronic Fatigue or Low Energy
  • Chronic Infections
  • Chronic Debilitating Pain
  • Heartburn or Upset Stomach
  • Hot Flashes
  • Joint Pain or Stiffness
  • Menstrual Cycle Issues
  • Night Sweats
  • Rashes
  • Sexual Dysfunction/Low Libido
  • Trouble Sleeping
  • Weight Issues

I am extremely grateful for CFFH.

“I am extremely grateful for CFFH. We have seen at least 13 doctors for my 9 year old daughter with Autism. Finally we have answers to her most confusing issues and a doctor who knows how to treat them. She has always had trouble taking the vitamins and medications prescribed before. She is improving steady without all the side effects we are used to. The most thorough workup we have had and finally got answers. I am beyond grateful. Has truly been a gift!”

~ Jamie Kosten, CFFH parent of a patient

The Center offers a proprietary, state-of-the-art treatment protocol based on five key pillars of wellness:

Pillar 1: Identify

Our first steps identify the root causes, triggers, and contributing factors of your symptoms. This typically involves appointments, tracking, and testing. You will also play an active role, as you spend time identifying for yourself what might be negatively impacting your health.

Pillar 2: Reduce

These steps will help you cut out stressors, toxins, and causes of inflammation. Reducing negative influences on your physical health and mindset are a key part of your health journey.

Pillar 3: Optimize

We are not just aiming for you to feel better – we want you to feel your best! That means taking steps to detoxify your body and restore optimal function.

Pillar 4: Support

Structural support will come through supplements and movement, as well as other tools that support important processes and systems in your body. Your own work will be critical here, including building supportive relationships and implementing our tips for self-care.

Pillar 5: Personalize

We want you to take an active role as we customize your lifestyle to your own personal body chemistry, history, and emotional needs. It is important that you learn what makes you feel your best so you can make informed choices in the future.

Schedule an Appointment Today.

The Center for Fully Functional Health® is led by a team of award-winning, internationally recognized physicians, committed to providing personalized, life-changing care.

40 North Rangeline Rd. Carmel, IN 46032

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