"We can confirm that Artie is in the hospital," Lange's camp said in a statement. "Artie has chosen to keep all information on this matter between him and his doctor. There will be no further comment."

Lange, who has a history of substance abuse struggles, has been missing from Stern's satellite radio show since early December and canceled several stand-up gigs in recent weeks, including a New Year's Eve engagement. 

Read more at E! Online [1].†