Bruce Clarke, MD

Board Certified Physician

Dr. Clarke attended the Texas Tech University Health Sciences Center School of Medicine, and completed his residency at John Peter Smith Hospital in Fort Worth, Texas. He also serves as one of the physicians at Family Medicine Center in Canyon. Dr. Clarke is certified by the Institute for Functional Medicine and is board certified in family medicine.

Amanda Moss

Certified Family Nurse Practitioner

Amanda graduated from Texas A&M University with a Bachelor's Degree in Nutritional Sciences and from Texas Woman’s University with a Master’s in Nursing and training as a Nurse Practitioner. Amanda has experience in family medicine, internal medicine, and functional medicine. Amanda believes that modern medicine should be integrated into a holistic approach to assist patients in obtaining optimum health.

Rhonda Roden, BS

Wellness Coach

Rhonda earned her Bachelor of Science degree in Kinesiology from West Texas A&M University in Canyon, Texas. She has 24 years experience in fitness training and nutrition counseling as well as 7 years experience in corporate wellness.  Rhonda has been a wellness coach for 10 years and is certified by the Wellness Coaching Corporation.

Kyla Brickman

Functional Nutrition Coach

Kyla is an expert in Functional Nutrition certified by the Institute of Integrative Nutrition in New York. She has worked alongside conventional and functional medicine doctors for 3 years, treating their patients and helping correct their nutrition and deficiencies.

Jeff Whelchel, MD

Board Certified Physician

Dr. Whelchel received his medical training at the Texas A&M University Health Science Center in College Station, Texas and completed his residency at the McLennan County Family Practice in Waco, Texas.
Dr. Whelchel was born and raised in Claude, Texas and has been a family physician in Amarillo for the last 21 years.

Jennyfer Williams

Licensed Vocational Nurse

Jennyfer completed her LVN training in 2016 and has worked with Dr. Clarke for two years. In that time, she developed a passion for functional medicine and the impact it can have on the lives of her patients. She's also seen the benefits of the functional medicine first hand. Jennyfer is a certified BioTE nurse.

Kristen Reneau

Functional Fitness Coach

Kristen received her personal training certification through the Cooper Institute in Dallas, Texas. She has  more than 14 years of experience in the fitness industry. Her experience includes group fitness, group and personal training, and medical wellness.

Our Practice


Functional Medicine is an innovative approach to health care that focuses on multiple aspects of your health, which include emphasizing wellness, prevention, fitness, and nutrition. Together, we will work to focus on all the underlying issues that impact your health and create a path for the healthiest you possible.

Functional medicine recognizes that disease is a continuum, not a single point in time in a person's history of health.  It also recognizes an individual's biological uniqueness and takes into account their personal health history, disease progression, and treatment preferences.  Conventional medicine tends to group together a set of symptoms and calls that a disease. Medication or therapy is then prescribed that treats or reduces those symptoms, usually never addressing what caused the symptoms to develop in the first place.  Functional medicine searches for the root issue that caused the symptoms then works to correct that underlying issue. The symptoms will then typically reduce or resolve as a result. This is the only way to have a lasting benefit beyond just suppressing symptoms.

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Our Team

Center for Functional Medicine

4514 Cornell Ste. B

Amarillo, TX 79109

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