Lange, who is a regular on Howard Stern's radio show, was checked into the Jersey City Medical Center in New Jersey over the weekend (02-03Jan10) after his mother reportedly found him wounded at his apartment.
A spokesperson for the star confirmed to RadarOnline.com he has been discharged, but refused to comment on Lange's condition.
Paramedics found Lange with nine "self-inflicted stab wounds", according to police Lieutenant Detective Mark Competello.
Cops have since told the website they are treating the incident as a suicide attempt and no further investigation is planned.
The funnyman had his driving licence revoked for seven months in September (09) after pleading guilty to driving under the influence of drugs. He told police he had a prescribed sleeping pill in his system when he was pulled over, and was ordered to serve 12 hours in an intoxicated driver resource program.
He has previously discussed his battles with depression, a prior suicide attempt, his heroin addiction and his father's death.