The funnyman, who has struggled with drug and alcohol addictions for years, checked into the Oasis Treatment Center in California on Tuesday (26Jun12) after concerned friends and co-workers staged an intervention during filming for his Internet TV show Andy Dick Live!.
Dick's boss Alki David confronted the star about his demons during one recent episode and then gave him an ultimatum - to conquer his troubles in rehab once and for all or quit the show.
David told the embattled comic, "I told you the other day, if this continues, we can't carry on. And if you decide to leave and not do that (check into rehab), I'm afraid that we can't carry on here together."
Dick, 46, was moved to tears by the intervention and hugged the cast and crew after admitting he had been through "ups and downs".
He was then escorted to the medical facility in Anaheim, where he enrolled in a treatment programme, reports gossip website Celebuzz.com.
It is Dick's latest desperate attempt for sobriety - he has been in and out of rehab more than 10 times and has hit the headlines for all the wrong reasons of late following numerous arrests and lawsuits.
He was ejected from an adult entertainment awards ceremony in Las Vegas last year (11) after allegedly pestering a porn star, while he was also accused of flashing his genitals in a Los Angeles coffee shop in 2010 and arrested for reportedly wandering into a random house in Los Angeles in the middle of the night.