Ind. Code § 12-7-2-130 : HUMAN SERVICES — GENERAL PROVISIONS AND DEFINITIONS — DEFINITIONS —7-2-130 - "Mental illness" TEXT PDF "Mental illness" means the following: (1) For purposes of IC 12-23-5, IC 12-24, and IC 12-26, a psychiatric disorder that: (A) substantially disturbs an individual's thinking, feeling, or behavior; and (B) impairs the individual's ability to function. The term includes intellectual disability, alcoholism, and addiction to narcotics or dangerous drugs. (2) For purposes of IC 12-28-4 and IC 12-28-5, a psychiatric disorder that: (A) substantially disturbs an individual's thinking, feeling, or behavior; and (B) impairs the individual's ability to function. The term does not include developmental disability. IC 12-7-2-130 Pre-1992 Revision Citations: subdivision (1) formerly 16-14-9.1-1(a); subdivision (2) formerly 16-13-21-1. Amended by P.L. 117-2015, SEC. 11, eff. 7/1/2015. As added by P.L. 2-1992, SEC.1.