Simplify the following text for a Grade 6 native English-speaking person.
Original: Otis R. Bowen , M.D. ( born February 26 , 1918 ) , was the governor of the American state of Indiana from 1973 to 1981 .
Simplified: Otis Ray Bowen , M.D. ( born February 26 , 1918 ) is a retired U.S. politician and physician . He served as the 44th Governor of Indiana from 1973 to 1981 and as Secretary of Health and Human Services from 1985 to 1989 .