Dr. Timothy Johnson

— -- Dr. Timothy Johnson is a Senior Medical Contributor for ABC News and one of the nation's leading medical communicators of healthcare information. Previously, Dr. Johnson was the Chief Medical Editor for ABC providing on-air medical analysis for "World News," "Nightline" and "20/20." He has provided commentary on medical problems and answers for viewers of ABC News' "Good Morning America" since the program's debut in 1975.

Dr. Johnson has helped spearhead several division-wide reporting efforts on a range of key issues, including practical ways to fix the American healthcare system and the fight against cancer, diabetes and Alzheimer's disease.

Dr. Johnson's programs and feature reports have won several awards, including an Emmy Award from the National Academy of Television Arts and Sciences, as well as two Emmy Awards from the Boston/New England Chapter of the same organization.

In 1999 he earned a Gabriel Award in the best news story category for the two-part piece, "Alzheimer's: A Faded Memory." Dr. Johnson was selected as the recipient of the 1998 Bradford Washburn Award presented by the Museum of Science, Boston -- an honor also bestowed upon Jacques Cousteau, Walter Cronkite, Dr. Jane Goodall and Alan Alda, among others. In 1988 he received the Lewis Thomas Award for Communications from the American College of Physicians, and in 1987 and 1989 he won the Howard W. Blakeslee Award given by the American Heart Association.

Dr. Johnson is the founding editor of the Harvard Medical School Health Letter and co-editor of the Harvard Medical School Health Letter Book. He is also co-editor of the bookYour Good Health, co-author of Let's Talk and author of Dr. Timothy Johnson's On-Call Guide to Men's Heath and Finding God in the Questions: A Personal Journey.

Originally headed for the ministry, Dr. Johnson graduated in from North Park Seminary in 1963, then decided two years later to enter medicine. A Phi Beta Kappa graduate of Augustana College, he graduated summa cum laude from Albany Medical College and holds a master's degree in public health from Harvard University. He has had appointments at both Harvard Medical School and Massachusetts General Hospital.

Dr. Johnson is married and is the father of two children and the grandfather of three children.