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:

SYMHC Classics: COINTELPRO 1
39:12

Behind the Scenes Minis: It's Not Unprecedented
16:46

The Rendition of Anthony Burns, Part 2
43:32