Arkansas Children's Hospital is a pediatric hospital with a Level I trauma center in Little Rock, Arkansas. It is among the largest in the United States, serving infants, children, teens, and young adults from birth to age 21. ACH is affiliated with the University of Arkansas for Medical Sciences and serves as a teaching hospital with the UAMS College of Medicine's Department of Pediatrics. ACH staff consists of more than 505 physicians, 200 residents, and 4,400 support staff.