IMAC - Key Persons


Brittany Massey

Brittany Massey grew up in southeastern Kentucky and attended Eastern Kentucky University, graduating with her BSN 2011. As an RN, she worked in various specialties including oncology, telemetry, emergency, and patient experience. She later returned to school and graduated from Walden University in early 2020 with an MSN-FNP and became nationally board certified later that same year. She loves spending her free time with her 2 children.

Chuck Renner

Job Titles:
  • Occupational Therapist
Chuck Renner is an Occupational Therapist and a Certified Hand Therapist.  He received his B.S. from the University of Kansas in 1984 and hand therapy certification in 1991.   He is Vice President of Clinical Development for Occupational Therapy services for IMAC.

Daniel R. Farr

Daniel R. Farr, DC is a licensed chiropractor in Kentucky and Missouri, and is the lead chiropractor / case navigator at the IMAC Regeneration Center in Murray, KY. He owned a successful chiropractic office from 2002 - 2013 and began with IMAC Regeneration Centers in March of 2017.

Dr. Derek Snodgrass

Dr. Derek Snodgrass is the lead treating chiropractor for IMAC Regeneration Center in Paducah, Kentucky. He attended his undergrad at the University of Missouri before obtaining his Doctorate in Chiropractic from Logan College of Chiropractic in Chesterfield, Missouri in 2008.

Dr. Devin Bell

Job Titles:
  • Family Practice Physician
Dr. Devin Bell is board certified as a Family Practice physician and is the lead medical doctor at Ozzie Smith IMAC Regeneration Center.

Dr. Hoai Luu

Job Titles:
  • Lead Physical Therapist at IMAC Regeneration Center
Dr. Hoai Luu is the lead physical therapist at IMAC Regeneration Center in Arlington Heights, IL. Dr. Luu obtained his Doctorate of Physical Therapy from Rosalind Franklin University in North Chicago in 2014.

Dr. Jason Brame

Dr. Jason Brame is the lead chiropractor at the Ozzie Smith IMAC Regeneration Center.  He grew up in St. Louis and eventually earned his degree from Logan College of Chiropractic in St. Louis, MO.  Dr. Jason has been with IMAC Regeneration since 2012 and would never practice any other way.

Dr. Martin "Marty" Willmitch

Dr. Martin "Marty" Willmitch is the lead chiropractor at IMAC Regeneration Center in Tampa, FL. Originally from Ohio, Dr. Willmitch obtained his Bachelor of Science in Human Biology, 1996, and Doctorate in Chiropractic, 1998, from the National College of Chiropractic in Lombard, Illinois.

Dr. Mary Chase

Dr. Mary Chase is the lead chiropractor at IMAC Regeneration Center in Murray, KY. Originally from Las Vegas, Nevada, Dr. Chase obtained her Doctorate in Chiropractic from Logan College of Chiropractic in Chesterfield, Missouri in 2011.

Dr. Omair Chishti

Dr. Omair Chishti is a NBCE board certified Doctor of Chiropractic and is the lead chiropractic physician at IMAC Regeneration Center, Arlington.

Dr. Patrick Campbell

Dr. Patrick Campbell was born and raised in Kentucky. He attended undergraduate school at Morehead State and went on to graduate from Life University's School of Chiropractic in 1999. He has been practicing chiropractic in the central Kentucky area for over 20 years. Dr. Campbell enjoys golf and UK basketball and football. He spends his time outside the clinic with his wife Jennifer, their two children Jackson and Presley, and their dog, Jagger.

Eric Pollock


F. Allen Johnston

A board-certified orthopedic surgeon specializing in pain management techniques. He serves as one of Louisiana's premier medical experts in the medical-legal field.

Kayla Klope

Before joining IMAC in 2021, she worked in the fields of orthopedics, behavioral health, and pain management. She was drawn to IMAC due to their integrated approach and treatment success without surgery. She is passionate about helping others in the community without opioids and invasive procedures.

Kyle Wessel

Job Titles:
  • Lead Physical Therapist at the Tony Delk IMAC Regeneration Center
Kyle Wessel is the lead physical therapist at the Tony Delk IMAC Regeneration Center in Lexington, KY. He graduated from Morehead State University in 2015 with his Bachelor of Biomedical Science and then went on to earn his Doctorate of Physical Therapy at Marshall University in Huntington, WV in 2018. Kyle has worked in acute, SNF and outpatient settings before joining IMAC in 2022. He was raised in Ashland, KY and has two younger siblings. Kyle enjoys fishing and mountain biking in his spare time.

Laura Clark

Job Titles:
  • Nurse Practitioner
Laura Clark is a Nurse Practitioner, with a degree in Family practice, but specializes in orthopedics. Her orthopedic experience includes both working alongside orthopedic surgeons in surgery and clinic settings.

Marla Munsen

A Nebraska native, Marla moved to Springfield to play collegiate basketball and volleyball at Drury University. Following graduation, I decided to pursue a degree in physical therapy and chose Missouri State University Doctor of Physical Therapy.

Matthew Tackett

Job Titles:
  • Chiropractor
Matthew Tackett is the chiropractor on staff at Tony Delk IMAC Regeneration in Lexington, KY. He attended Cleveland College in Kansas City, MO where he obtained his Bachelor's of Human Anatomy. He later graduated in 2000 with his Doctorate of Chiropractic. Dr. Tackett has been practicing in central Kentucky for over 22 years and enjoys spending his free time outdoors with his wife Leslie and their two sons going fishing, hiking, and golfing.

Michelle Flanagan

Michelle graduated from St. Louis University In 1998 with a Masters in Physical Therapy and Bachelors in Exercise Science. Michelle has a longstanding career in home health since 2003, treating both the pediatric and geriatric population, as well as orthopedic post-surgical patients and spinal cord injury. Michelle began her journey in 2019 with IMAC. She is licensed in both MISSOURI and Kentucky. Michelle is a certified LSVT clinician.

Paula Cahill

Paula Cahill, ANP-BC is a board-certified Nurse Practitioner who has been practicing at Illinois Spine & Disc for 5 years, currently, IMAC Regeneration Centers, Arlington.  She earned her bachelor's degree and master's degree from Loyola University in Chicago.  She is a member of ANCC (American Nurses Credentialing Center, and ISAPN, Illinois Society for Advanced Practice Nurses.

Ricardo A. Knight

Ricardo A. Knight, M.D., MBA, began his career in rehabilitation medicine as a Physical Therapist in 1987 and later received his Medical Degree in 1993 from State University of New York at Buffalo, School of Medicine and Biomedical Sciences.

Robert Kustarz

Dr. Robert Kustarz the lead treating chiropractor for IMAC Regeneration Center in Fort Pierce, Florida. He attended undergrad at the University of Pittsburgh before obtaining his Doctor of Chiropractic and Master's in Sport Health Science degrees from Life University in Marietta, Georgia in 2015. He practiced for several years in Georgia and Florida, working with pediatric, perinatal, and sports/rehabilitative care before joining IMAC. Dr. Kustarz enjoys helping people realize their inborn healing potential and helping patients experience life again.

Sean McDonald

Sean McDonald, MD, began his career in the Western Kentucky area as a partner in a local neurosurgical practice and soon realized a void in the conservative treatment options available in traditional medicine. With Dr. McDonald's commitment to developing alternative healthcare solutions, he began researching the advancements in regenerative medicine. He is also a member of the American Academy of Orthopedic Medicine and received the Gold Medal in 2000 for the highest marks on the Neurosurgical Fellowship Exams. Outside the walls of IMAC, Dr. McDonald enjoys a competitive game of soccer or volleyball and spending time with his miniature dachshund, Ellie.

Stacia Jones

Stacia Jones, PA-C was born in Georgia and studied Physician Assistant in Savannah, Georgia. After first working in neurosurgery, urgent care, and orthopedics, she moved to Illinois four years ago and started to work in pain management.

Tonya Ellington

Job Titles:
  • Physical Therapist at IMAC Regeneration Center
Tonya Ellington is a physical therapist at IMAC Regeneration Center in Paducah, Kentucky. She received her Bachelor's of Science degree in psychology and Bachelor's of Health Science degree in physical therapy from the University of Kentucky.