This Issue Brief provides an overview of and crosswalk between the Privacy Rule and the federal Confidentiality of Alcohol and Drug Abuse Patient Records statute, 42 U.S.C. § 290dd-2, and its implementing regulations at 42 C.F.R. Part 2 ( 42 C.F.R. Part 2 ). The crosswalk is intended to highlight the differences between the requirements of the Privacy Rule and 42 C.F.R. Part 2. In addition, this Issue Brief addresses the Privacy Rule\u27s applicability to special populations and psychotherapy services provided by substance abuse paraprofessionals