Mass. Gen. Laws ch. 176B, § 4LL: Filling of remaining portion of prescription for covered drug that is a narcotic substance earlier filled in lesser quantity

Section 4LL. Any subscription certificate under an individual or group medical service agreement delivered, issued or renewed within the commonwealth shall provide, for any covered drug that is a narcotic substance contained in schedule II pursuant to chapter 94C and subject to cost sharing, that if a person receives a prescription filled in a lesser quantity pursuant to section 18 of said chapter 94C, said person shall not be subject to an additional payment obligation, including but not limited to co-payments, if said person fills the remaining portion of the prescription.