Calvin C.J. Sia (born Calvin Chia Jung Sia, June 3, 1927 - August 19, 2020) was a primary care pediatrician from Hawaii who developed innovative programs to improve the quality of medical care for children in the United States and Asia. Two particular programs have been implemented throughout America: the Medical Home concept for primary care that has been promoted by the American Academy of Pediatrics and the federal Emergency Medical Services for Children program administered by the U.S. Department of Health and Human Services’ Health Resources and Services Administration, Maternal and Child Health Bureau. His Medical Home model for pediatric care and early childhood development began to take root in several Asian countries in 2003.