Dr. Daniel Hale Williams is often described as the first person to successfully perform an open-heart surgery. That's not entirely accurate, but he was still a surgical innovator, and he was also a huge part of the Black Hospital Movement.
Research:

Elizabeth Peratrovich
43:42

SYMHC Classics: Dr. Lucy Hobbs Taylor
29:58

Behind the Scenes Minis: Carry-on Bags
28:38