Question: does mark sloan die on grey's anatomy

Answer: Yes, In the ninth-season premiere, it is discovered that Mark is on life support due to the extensive injuries he sustained in the plane crash and, as determined by his will, the machines would be turned off if he showed no signs of waking within 30 days. Flashbacks of some moments in Mark's life showcased him being videotaped as he was extending his congratulations to newlyweds Callie and Arizona. At the end of the speech, he declares that Lexie was the one he wanted to grow old and dance with in their granddaughter's wedding. At 5:00 that day, with Derek and Callie keeping vigil at his bedside, the machines were turned off, and Mark Sloan died shortly thereafter. The following episode reveals that he had a surge of good health upon his return to Seattle Grace before ultimately succumbing to his injuries. His 'surge' allowed him enough energy to advise his protégé Jackson, 'when you love someone, tell them', which is believed to be a reflection on the major obstacle of his failed relationship with Lexie. During this momentary energy, Mark also took the opportunity to make a clean break with his girlfriend, Julia, stating that the situation was not fair to her as he had always loved only Lexie. Following his death, Shonda Rhimes muses regarding Mark and Lexie's relationship: '...he and Lexie get to be together in a way. Their love remains true.'' Seattle Grace Mercy West Hospital is later renamed Grey Sloan Memorial Hospital in tribute to Lexie and Mark.