and individually taught his techniques to many surgeons.

Kelman pursued a career as an entertainer alongside his medical career. He began playing the harmonica at a young age and performed on a radio show, The Horn and Hardart Children's Hour. He later learned to play the clarinet and saxophone. As a teenager, he formed a big band, began composing music, and played in his high school band and as first clarinet on the New York All-City Orchestra.