Dr. George Dietz, 82, never dreamed of a day when he might retire.
The Oak Park resident maintains a practice on Chicago's South Side and makes house calls three days a week, often driving more than 100 miles in a day to treat the bed-bound.
"Until God closes me out, I'm open for business," he told one of his patients, Mia Stevens, on a recent trip to her Richton Park home.
Dietz grew up in Detroit not knowing what he wanted to do but gravitated toward practicing medicine because of two people: his father and an old football coach.
"I liked how my dad helped me when I didn't feel good," Dietz said.
Toward the end of high school, he wrote an old coach and priest, asking him what he should do with his life. "He wrote back and said, 'Well, you did good in high school. Why don't you be a doctor?'
"That settled it."