Mass. Gen. Laws ch. 176G § 4Z
For the purposes of this section the term "substance abuse treatment" shall include: early intervention services for substance use disorder treatment ; a substance use disorder evaluation, as defined in section 51 1/2 of chapter 111; outpatient services including medically assisted therapies; intensive outpatient and partial hospitalization services; residential or inpatient services, not covered under section 4AA; and medically managed intensive inpatient services, not covered under said section 4AA.
Any individual or group health maintenance contract that is issued or renewed shall not require a member to obtain a preauthorization for substance abuse treatment if the provider is certified or licensed by the department of public health.
Mass. Gen. Laws ch. 176G, § 4Z