Dr. Timothy Johnson, M.D.
Johnson is the medical editor for ABC News and appears regularly on World News Tonight, Nightline, Good Morning America, and 20/20. He holds joint positions in medicine at Harvard University and Massachusetts General Hospital in Boston.
Johnson is the medical editor for ABC News and appears regularly on World News Tonight, Nightline, Good Morning America, and 20/20. He holds joint positions in medicine at Harvard University and Massachusetts General Hospital in Boston. See less
