Our Staff

Meet Our Functional MD Led Team

Dr. Eric Potter, IFM Certified MD

Founder, Physician

Dr. Eric Potter graduated from Vanderbilt Medical School and then went on to specialize in internal medicine (adult) and pediatric care, spending significant time and effort in growing his medical understanding while caring for patients from all walks of life. In recent years, he devoted countless hours to obtaining the Institute for Functional Medicine Certification (link here).  This certification places him within a small group of regional practitioners who have completed the entire program.  At Sanctuary you will find the best of the conventional medical field combined with the best of Functional Medicine.

Beyond the science, Dr. Potter has personally experienced healthcare crises from both sides of care–as a physician and as a family member to patients. Working within our broken healthcare system and taking his family members through that same system inspired him to look for new ways to deliver the quality of healthcare he envisioned.  Stepping out of the insurance-based model of medicine allows him to provide whole person care in longer visits.  Providing wholesale pricing on lab tests and supplements removes the profit motive for these services, allowing patients to trust his recommendations.  Practicing Functional Medicine allows him to treat root causes rather than superficial symptoms. He endeavors to be the patient’s trusted advocate with the goal of restoring a healthier more abundant life.

Besides serving as a physician, he is married to an amazing wife and has six beautiful children. Their family has been shaped by the providential occurrences in their lives, including the beauty of adoption.

Dr. Potter also enjoys running, reading, hiking, and spending time with his family.

“Whatever you do, work at it with all your heart, as working for the Lord and not man.” – Colossians 3:23

Continuing Medical Training And Certifications

  • Institute of Functional Medicine – Certified Practitioner
    • Advanced Practice Modules (APM): Cardiometabolic, Detox, GI, Hormone, Energy, Immune, Applying FM in Clinical Practice
    • Advanced Clinical Training: Pediatrics
  • Mold Toxicity Training
    • Shoemaker Surviving Mold 2019 Conference Attendance
    • International Society of Environmentally Acquired Illnesses 2019 Conference Attendance
  • Internal Medicine Board Certified
  • American Academy of Pediatrics Board Certified
  • Ben Lynch, Seeking Health Institute
    • 13 MTHFR and Nutrigenomics Courses
    • SHEICON 2015, 2016, 2017 Yearly Conferences
      • Member of Mastermind group at SHEICON2016 strategizing on advancing this approach to patient care.
  • Methylation and Bio-individualized Medicine
      • January 2015 Epigenetic Course
  • Extensive Self-Directed Research into the Methylation Cycle as it applies to all areas of health
    • William Walsh MD, Amy Yasko, and others
  • Audio Digest
    • Internal Medicine, Family Practice, Pediatrics, Psychiatry, Emergency Medicine


More Information:

Leslie Mullins

Physician Assistant

Leslie Mullins, PA-C, received her Masters in Medical Science from Midwestern University in 2012. Upon graduation, Leslie embarked on a career as a neurosurgery physician assistant where she provided medical services in the clinic, hospital, neurological intensive care unit, and operating room assisting with brain and spine surgery. Leslie also served through medical missions around the world utilizing her fluency in French and Spanish. Due to her love of people and travel, she became a travel neurosurgery physician assistant where she gained extensive medical experience working in many different hospitals all over the nation. While being immersed in acute medicine and working with very ill patients, Leslie gradually began to ask herself if more could be done to prevent so much pain and suffering. She learned about functional medicine and discovered a new passion. Leslie completed her functional medicine education and is currently in the process of certification. She comes to Sanctuary Functional Medicine from her hometown of Denver, Colorado and has moved to Nashville after recently getting married.

Leslie enjoys spending time with family and friends, using her God-given gifts to serve, traveling and adventure, outdoor and water activities, health and fitness. She looks forward to discovering middle Tennessee and serving the people of the community and surrounding areas.

Continuing Medical Training And Certifications

  • Institute of Functional Medicine

        • Advanced Practice Modules (APM): Cardiometabolic, Detox, GI, Hormone, Energy, Immune, Applying FM in Clinical Practice
    • Neurofeedback – Clear Mind Center


Coming Soon

Brooke Blackburn

Brooke Blackburn is a Tennessee native who started in the medical field as a candy striper. In 2015, she earned her AEMT (Advanced Emergency Tech) Certification from Columbia State Community College. Her experience ranges from physician offices to EMS at Maury Regional Medical Center.

In 2015, she earned her AEMT (Advanced Emergency Medical Tech) through additional training and plans to further her education at nursing school. When not at work, Brooke enjoys spending time with her 3 children and friends who have become family. Camping, local festivals, school sports, competition cheer and tumbling are just a few of the activities that they enjoy together.

Georgia McCray

Georgia McCray has over 30 years experience working in the health care industry in both private practice and multi specialty practices, as well as hospital medicine and academic medicine. Her experience in billing, coding and health care operations has been a welcomed addition to the Sanctuary Functional Medicine team. Certified in office based coding, she also possesses a masters of Business Administration.

Georgia moved to Nashville from Illinois in 1997 and currently lives in Nashville, with her husband, where they enjoy watching local sports, cooking and traveling.

Sam Stevens

Sam has over 15 years experience in medical billing and practice management. She has worked various positions in as many specialties including Urgent Care, Plastics Surgery and Orthopedics.

Sam developed an interest in functional medicine and genetics while scouring medical journals in an attempt to avert an autism diagnosis for her son that could not be accomplished in a modern healthcare model. Sam lives in Primm Springs TN with her husband, 3 children, 3 dogs and a flock of chickens. “

Marlene Roncskevitz

Marlene eagerly joins Sanctuary with the goal of making each patient feel cared for, respected and given the attention that quality health care promises.

Marlene is originally from New Jersey and has lived in Tennessee for 30 years. After earning a Certification in Youth Ministry from Seton Hall University in New Jersey in 1986 she moved on to work for the Archdiocese of Miami, Florida and then landed in Tennessee to raise her family.

Marlene’s health care experience has been varied over the years, from working at DCI Donor Services, Physical Therapy to Cardiac Telemetry

Janet Fain

Janet Fain is a native from Long Island, New York. In 2019, her husband of 33 years transferred to TN for an employment opportunity, and their 3 children came soon after to join them. Janet started her career out of high school where she worked in an Internal Medicine practice as a Medical Assistant for many years. After raising her children, she went back to further her education and earned her license to practice in the state of NY.

Janet has worked as an LPN for many years in private practices in the New York area.

In her time off, Janet enjoys playing tennis, hiking, kayaking and cooking meals for her family.

Tina Franco

Tina Franco comes to Sanctuary Functional Medicine with 15 + years of nursing experience, the majority being in emergency and critical care. She has worked in fast-paced emergency departments as well as a flight nurse with medical air transportation services. She is currently pursuing her degree and accreditation as a Family Nurse Practitioner. It is her desire, after becoming a Family Nurse Practitioner, to continue her education and become certified in the field of Functional Medicine.

Tina has a passion for people and a purpose to do God’s work. She believes that the practice of functional medicine represents a crucial transition, from simply treating the symptoms of illness, to addressing underlying causes, and thus truly achieving a patient’s optimal health.

Kimberly Garrard

Kimberly Garrard is Texas native who has wanted to serve others in a meaningful way as long as she can remember. She earned her LPN degree from the Tennessee College of Applied Technology and has experience working as a certified nurse assistant, doula, midwife assistant, nanny, and elderly caregiver.

Kimberly has seen first hand the value of taking a functional medicine approach to care–healing ailments at their root causes through a combination of natural and clinical remedies.

Kimberly enjoys spending time with her her nine nieces and nephews, talking about Texas, watching football and photography.

Kira Whitham

Kira Whitham, Nutritionist at Sanctuary Functional Medicine, holds a Master’s in Health and Nutrition Education from Hawthorn University, as well as an additional 30 hours of training through the School of Applied Functional Medicine and IFM. She combines the principles of holistic nutrition and functional medicine to help people bring their bodies back to their intended state of wellness. She is a firm believer in the healing power of food and works hard to help her clients improve their relationship with food while gaining an understanding of what nourishes and depletes the body.