Dr. John Hartley works both as a Pediatric Hospitalist and as a General Pediatrician in the Ambulatory Pediatric Clinic. He also serves as an Assistant Professor of Pediatrics at the University of Arizona College of Medicine in Phoenix and for Creighton School of Medicine.

He has been a Board-Certified Fellow of the American Academy of Pediatrics since 2002. After completing a rotating internship at Good Samaritan Hospital in Phoenix in 1999, he completed his pediatric residency at the combined Phoenix Children's Hospital/Maricopa Medical Center in 2002. He went to medical school at the University of North Texas Health Science Center in Fort Worth, TX. His undergraduate studies were at Brown University in Rhode Island, where he graduated with honors with a B.A. in Latin American Studies in 1988. He then spent 3 years living in Honduras, Central America before deciding to go to medical school.

Nearly an Arizona native, his family moved to Mesa when he was in second grade and he has always felt at home in the desert. In his free time he enjoys hiking, spending time with his wife, and working with youth in volunteer capacities.