Mass. Gen. Laws ch. 111 § 121B
Notwithstanding any general or special law to the contrary, the department, in consultation with the board of registration in medicine, shall promulgate regulations authorizing a physician, physician assistant, nurse practitioner or certified nurse midwife who is authorized under chapter 94C to prescribe and dispense prescription drugs and who diagnoses infections due to Chlamydia trachomatis and other sexually transmitted infections suitable for expedited partner treatment based on national standards, including, but not limited to, standards outlined in the Center for Disease Control's Sexually Transmitted Infections Treatment Guidelines and as further defined in regulation by the department, to prescribe and dispense such prescription drugs to a patient's sexual partners for the presumptive treatment of infection without an examination of the patient's sexual partners.
Mass. Gen. Laws ch. 111, § 111:121B