Mass. Gen. Laws ch. 176B § 4I
Any subscription certificate under an individual or group medical service agreement, except certificates which provide supplemental coverage to Medicare or other governmental programs, which shall be delivered or issued or renewed in the commonwealth shall provide as benefits to all individual subscribers and members within the commonwealth and to all group members having a principal place of employment within the commonwealth for expense of cytologic screening and mammographic examination. Said benefits shall be at least equal to the following minimum requirement; (a) in the case of benefits for cytologic screening, said benefits shall provide for an annual cytologic screening for women eighteen years of age and older; and (b), in the case of benefits for mammographic examination said benefits shall provide for a baseline mammogram for women between the ages of thirty-five and forty and for mammogram on an annual basis for women forty years of age and older.
Mass. Gen. Laws ch. 176B, § 4I