Comings (born March 8, 1935) is an American medical geneticist and former chief of genetics at the City of Hope National Medical Center in Duarte, California, a position he held from 1966 until his 2002 retirement.
He has served as the president of the American Society of Human Genetics (1988) and the editor-in-chief of The American Journal of Human Genetics (1979–86).
He has been a fellow of the American Society for Clinical Investigation since 1968.
He is known for his research on the genetics of Tourette's syndrome, which he began studying in 1980 with his wife, Brenda Comings.
He has also studied the role of genetics in nicotine addiction and alcoholism.
In 1994, his medical license was revoked by the Medical Board of California because he, according to the Los Angeles Times, "excessively prescribed controlled substances to his wife, thereby committing gross negligence, incompetence and repeated negligent acts".
The revocation was later stayed by the Board, but Comings also received five years' probation.