Answer
There are many interesting facts on Danie Hale Williams. Some of them include: Williams opened Provident Hospital in 1893 and it was the first interracial hospital, he was the first physician to perform open heart surgery on a patient, he was chief surgeon at the Freedmen's Hospital, Williams was first a barber like his dad was but decided to keep furthering his education instead of staying in that field, and he received training at Chicago Medical College.
Reference: www.biography.com