Mass. Gen. Laws ch. 94C, § 19D1/2
(a) For the purposes of this section, the following words shall, unless the context clearly requires otherwise, have the following meanings:
''Opioid antagonist'', as defined in section 19B.
''Substance use disorder treatment facility'', a facility licensed or approved by the department or the department of mental health to offer treatment for substance use disorder, including, but not limited to: (i) withdrawal management services; (ii) clinical stabilization services; (iii) transitional support services; (iv) residential support services; (v) community behavioral health center services; (vi) office-based opioid or addiction treatment services; or (vii) inpatient or outpatient substance use disorder services.