Born in Santa Monica, CA and raised in Los Angeles. Dr. Casillas obtained a B.S. in Business Administration from the University of Southern California. He then completed medical school at UC San Diego before returning home to Los Angeles for Emergency Medicine residency at Harbor UCLA Medical Center. In 2007, he joined the medical staff at Santa Monica UCLA Medical Center. In 2015, Dr. Casillas moved into a new position as Medical Director for the Emergency Department at Martin Luther King Jr. Community Hospital (MLKCH) and helped open this new non-profit hospital in South Los Angeles. Since 2015, MLKCH has quickly grown into one of the busiest Emergency Departments in Los Angeles County. While at MLKCH, Dr. Casillas has been an active medical staff participant, serving on the Medical Executive Committee and numerous other clinical committees. Dr. Casillas is married with four children and has also enjoyed coaching sports at the youth and high school levels for the past 20 years.