William Henry Beierwaltes

William Henry Beierwaltes ( – August 14, 2005) was an American physician who was a pioneer in the use of nuclear medicine. Beierwaltes building on the established work of Saul Hertz, developed innovations in the use of iodine-131 and in surgery in treating thyroid cancer, in establishing a university training program in nuclear medicine and in the use of radiolabeled antibodies to detect cancer.

Early years and education Beierwaltes was born , and grew up in Saginaw, Michigan. He spent the vast majority of his career at the University of Michigan, earning a bachelor's degree there in 1938, his medical degree in 1941 and completed his residency as an endocrinologist in 1945.

Beierwaltes retired from the University of Michigan at age 70 and moved to Grosse Pointe, Michigan, where he continued work at the local St. John Hospital and at William Beaumont Hospital in Royal Oak, Michigan. He "finally and unequivocally" retired from clinical work on August 31, 1994. He died on August 14, 2005, aged 87 or 88.