Mass. Gen. Laws ch. 94C, § 18B
(d) No health care provider or employee of a health care provider acting in good faith shall be subject to criminal or civil liability or be considered to have engaged in unprofessional conduct for failing to offer or administer a prescription or medication order for an opiate under the voluntary non-opiate directive form.
No person acting as an agent pursuant to a health care proxy shall be subject to criminal or civil liability for making a decision under clause (iii) of subsection (b) in good faith.