Corey Haim -- OxyContin Twist

The prescription for Corey Haim that was allegedly part of a fraudulent prescription drug ring was for OxyContin.

The State Attorney General's Office tells TMZ Corey's name turned up in a massive investigation that started in October, 2009.

The A.G. says a prescription for OxyContin was written for Corey on a prescription pad that was not signed by an authorized doctor.