Charles Mingus July 20, 1972
There's a little discrepancy between the small jazz website I found, Lord, and jazzdisco.org regarding what tracks Dizzy plays on. Also, apparently some of the song titles are mistitled on certain issues.
With regard to "Blues Medley", I am unsure if that is the same as "Blues for Marie Christine" and "Mingus Melody #612/The Man Who Never Sleeps", but it would seem so. (thinktoomuch & jazzdisco both call it Blues Medley, while Lord lists those two separate tracks, and doesn't list anything called "Blues Medley")
With regard to the Dizzy stuff, though, I think it would be safe to err on the side of Jazzdisco.org and Lord, though.