Dr. Murphy and his wife have lived in Fallbrook for 32 years, raising their three daughters who are now thriving elsewhere in the state. They enjoy traveling, reading and movies. Dr. Murphy is an avid runner, and has completed 25 marathons. In April 2019 he ran the Boston Marathon for the 5th time. He also enjoys hiking and backpacking; in 2014, he completed the entire John Muir Trail in 19 days. Dr. Murphy encourages all patients to find a kind of exercise they can enjoy.