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Chiropractic Wellness Clinic
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Chiropractic Wellness Clinic
Schedule an Appointment

Our Services

  • Chiropractic Adjustments
  • Therapeutic Exercises and Activities
  • X-Rays and Imaging Services
  • Foot Orthotics
  • Nutritional and Therapeutic Supplements

Spinal Decompression Therapy

Parker University Chiropractic Wellness Clinics are transforming lives daily with spinal decompression therapy. This advanced technology treats neck and lower back problems. The non-invasive and non-surgical therapy aids in reducing neck and lower back pain, restoring function and your quality of life.Let us help restore your mobility and improve your quality of life.

Meet Our Team

  • Parker Faculty & Staff
  • Dallas Clinic
  • Irving Clinic

Parker Faculty & Staff

Stephen Paterno, DC

Director of Clinical Education, Parker Chiropractic Wellness Clinic – Dallas

Dr. Stephen Paterno is originally from Pennsylvania. He went to college at Shippensburg University of Pennsylvania and earned his Doctor of Chiropractic at Palmer College of Chiropractic, Florida. Dr. Paterno has taught in various areas of Biology, Chemistry, and Health Care Education since 2009. After 5 years as a Clinic Faculty Doctor, Dr. Paterno now serves as the Director of Clinical Education for Parker University. He resides in the greater Dallas area with his wife and 2 sons.

Doug Sanford, DC, BA,  MCS-P

Director of Compliance and Operations, Parker University Wellness Clinics

Dr. Sanford earned a Doctor of Chiropractic degree from Texas Chiropractic College in 1990.  After graduation he practiced as an associate doctor in Houston, Texas before entering private practice in Corpus Christi where he also served as a designated doctor.  He joined Parker Chiropractic College in 1995 where he served as a Clinic Faculty Doctor and gradually transitioned to course director for Internship I, II and III.  Dr. Sanford was mobilized by the United States Army in 2003 and retired from military service in 2008.  He returned to Parker College of Chiropractic as a Clinic Faculty Doctor and was later selected to be the Director of Compliance and Operations.

Leon Tom, BS, DC, CCSP, DAAPM, Director

Director of Clinics, Parker Chiropractic Wellness Clinic

Dr. Tom is originally from Toronto, Canada. He attended McMaster University where he earned a Bachelor of Science degree in Mathematics. He completed his Doctor of Chiropractic degree at Parker University – College of Chiropractic in 1999 and the Certified Chiropractic Sports Practitioner program from Logan University in 2001. In his free time, he enjoys cooking, spending time with his family, watching performing arts and playing ice hockey. Dr. Tom joined Parker University in 2005 as a Clinic Faculty Doctor and was promoted in 2009 to Director of the Irving Clinic. In 2018 he was promoted to Director of Clinics. His experience includes being a designated doctor for the Texas Department of Insurance.

Dallas Clinic

Davis McAlister, DC, MEd, BS, BA, HKC, PHRPC

Dr. Davis McAlister is a Clinic Faculty Doctor for the Parker University Dallas Wellness Clinic, beginning in 2017. Dr. McAlister earned his Doctor of Chiropractic from Parker University in 2003 and has been in practice for 16 years. Dr. McAlister has been a team doctor for various high school sports teams and both pro- and semi-pro sports teams. Dr. McAlister served in Military Intelligence for the US Army from 1991-1999 as a Human Intelligence Specialist and linguist. After his military service, he attended Mississippi State University to earn his bachelor’s degree in Science. Dr. McAlister has also earned a bachelor’s degree in Anatomy from Parker University, a master’s degree in Educational Leadership from Sul Ross State University. He also has certifications in Adaptive Rehabilitation, 100-hour acupuncture, concussion, and kettlebell. He specializes in chiropractic treatment for sports-related injuries, rehabilitation, taping, and soft-tissue.



After graduating from Parker College of Chiropractic in 1987, Dr. Raper entered immediately into private practice and pursued post-graduate training for his diplomate in Chiropractic Orthopedics. He started Impairment Rating Consultants in 1990, and has since been performing impairment ratings, second opinion evaluations, and expert court witnessing in the state of Texas. He was a consultant for the Texas Board of Chiropractic Examiners, and since 1996 is a consultant for the National Board of Chiropractic Examiners. He presently is on the Board of Directors for the Texas Chiropractic Association, Dr. Raper worked for Parker College of Chiropractic from 1992 to 1998 and again from 2005 to the present. Dr. Raper is licensed in Texas, Oklahoma, and Nevada.

Gary Tam, DC, FIAMA

Professor, Parker Chiropractic Wellness Clinic – Dallas

Dr. Tam, a practicing clinician and university educator with 18 years of experience in patient care, is certified in soft tissue techniques and functional movement systems, as well as fellowship trained in acupuncture with advanced course work in dry needling. Prior to joining the Parker University faculty, Dr. Tam served as the Director of Physical Services for a CARF facility, that focused on a multi- disciplinary evidence-based approach to the treatment of chronic pain in an outpatient setting.

David G. Walters, DC, DACRB

Professor, Parker Chiropractic Wellness Clinic – Dallas

Dr. Walters began his dedicated service to Parker in 1996 and is currently serving as a clinic faculty doctor at Parker University Chiropractic Wellness Clinic at the Dallas location. He received his Doctor of Chiropractic from Parker University College of Chiropractic in 1991. Dr. Walters is a Texas native, happily married since 1977 and has three adult children. Dr. Walters received his Diplomate in Chiropractic Rehabilitation in 2001 and a specialist certification in Corrective Exercise from the National Association of Sports Medicine in 2008. He completed the Certified Chiropractic Sports Physician in 2009. He is also a Kinesio Tape and Functional Kinetic Treatment practitioner. In addition to working at Parker University, he has owned and maintained a private practice in Irving, TX from 1994 until 2010. His annual recertification of his diplomate in rehabilitation allows him to stay current with issues and topics associated with functional rehabilitation and performance.

Nicky Kirk, DC

Parker Chiropractic Wellness Clinic – Dallas

Dr. Nicky Kirk is an award-winning and visionary chiropractic sports physician who works internationally with the top performance practitioners in sports medicine, nutrition, psychology, and strength and conditioning. In addition to his consultancy work, Dr. Kirk also utilizes his knowledge and influence to provide education about health, movement, and performance to developmental athletes at both clubs and schools in the USA, Europe, and the Caribbean. Dr. Kirk commenced with Parker University as a clinic faculty doctor in December of 2018 and is proud to be able to add his experience and know-how to the clinical education experience of the interns and help provide guidance in offering outstanding patient care to the patients of the Parker Wellness Clinic.

Cody Dimak, DC

Parker Chiropractic Wellness Clinic – Dallas

Dr. Dimak is originally from Lafitte, Louisiana. Dr. Dimak played college football at Nicholls State University where he also earned a BS in Biology/Pre-Physical Therapy. He went on to earn his Doctor of Chiropractic degree from Logan College of Chiropractic in St. Louis, MO. With extensive training in sports injuries and rehabilitation, Dr. Dimak’s clinical approach is to use patient-focused progressions to develop independence and resilience and get his patients back to their activity as quick as possible.

Irving Clinic

John Marth, DC

Associate Professor, Parker Chiropractic Wellness Clinic – Dallas

Dr. John Marth is a clinic faculty doctor at Parker University Chiropractic Wellness Clinics. Dr. Marth was born and raised in Long Island, NY, and received his doctorate in 1985 from Palmer College of Chiropractic in Davenport, IA. His postgraduate work included working as an associate doctor in St. John’s, Newfoundland, Canada. He also worked as a spinal screener for 12 clinics in the DFW area and as an associate doctor in Garland, Texas. In 1988, Dr. Marth started and ran a successful clinic in DeSoto, Texas, until selling it in 2008. In 2006, he became a clinic faculty doctor at Parker University Chiropractic Wellness Clinics.

Dr. Marth brings several years of knowledge and experience in which he is constantly striving to learn the latest breakthroughs in health and chiropractic to better serve his patients and students.