Peter Grinspoon is an American physician. He is an internist and medical cannabis specialist at Massachusetts General Hospital and an instructor at Harvard Medical School. He is an expert on the topic of medical and recreational cannabis, and also has a strong interest in the areas of physician health, addiction and recovery, and in psychedelic treatments. He is a certified physician coach for the MGH Center for Physician Well Being as well as a Health and Wellness Coach. His 2016 book Free Refills: A Doctor Confronts His Addiction describes recovery from an opiate addiction from his perspective as a physician.