The 41 year old, who recently performed at the Comedy Central Roast of Charlie Sheen, is currently recovering after falling ill.
Confirming the news, comedian Jim Norton tells U.S. radio's Opie and Anthony Show, on which O'Neal was a regular, "We wanted it to come from us. We don't know how he is. We don't know how he's going to be. I didn't want to do this by myself. I wish we had more news for you."
O'Neal's family has appealed for privacy, setting up an email account, LoveForPatrice@gmail.com, to receive messages from well-wishers.