After 4 years of undergratuate college, Dr. Mahan graduated from Northwestern Health Sciences University, undeniably one of the finest chiropractic schools in the world. In addition to rigorous clinical requirements, after 4 years of undergraduate work he received approximately 4480 hours over 4 years of classroom, laboratory and practical training in such courses as Biochemistry, Physics, Physiology, Embroyology, Anatomy, Neuroanatomy, Pediatrics, Geriatrics, Toxicology, X-ray, Diagnosis, Chiropractic Technique, etc. After achieving certifications in both full spine and extremity adjusting at Northwestern University, Dr. Mahan took a clinical residency in a field practice for 9 months while he also worked as a teaching assistant to instruct underclassmen of his school.