Ind. Code § 27-13-38-2
Subject to IC 16-42-22 :
(2) a health maintenance organization shall not require the substitution of;
a different single source brand name drug for a single source brand name drug written on a prescription form or electronically transmitted to a pharmacy unless the substitution is approved by the prescribing provider.
As added by P.L.69-1998, SEC.16. Amended by P.L.204-2005, SEC.20.