The television creator was awarded the honour for "breaking through the industry glass ceiling as a woman and an African American" at The Hollywood Reporter's Women in Entertainment event.
When accepting her award, Rhimes said she thought there had been a mistake, and said, "I haven't broken through any glass ceilings. If I had I would have felt some cuts, I would have some bruises. How come I don't remember that happening? Here's why: it's 2014."
Rhimes then paid tribute to the females who have helped her become successful.
"Making it through the glass ceiling was simply running on the path created by every other woman's footprint. I'm proud and honoured to receive this award because it was a group effort. I want to thank all the women in this room and all the women who never made it to this room."
Rhimes has created shows including 'Grey's Anatomy', 'Private Practice', 'Scandal' and 'How To Get Away With Murder'.