Mass. Gen. Laws ch. 175 § 47E
Any blanket or general policy of insurance described in sub-division (A), (C), or (D) of section one hundred and ten which is issued or subsequently renewed by agreement between the insurer and the policyholder, within or without the commonwealth, during the period this provision is effective, or any policy of accident and sickness insurance as described in section one hundred and eight which provides hospital expense and surgical expense insurance and which is delivered or issued for delivery or subsequently renewed by agreement between the insurer and the policyholder in the commonwealth during the period that this provision is effective shall provide benefits for services of a certified nurse midwife; provided, however, that expenses for such services are reimbursed when such services are performed by any other duly licensed practitioner; and provided, further, that such services are within the lawful scope of practice for a certified nurse midwife.
Mass. Gen. Laws ch. 175, § 47E