Mass. Gen. Laws ch. 176B, § 4O

Any subscription certificate under an individual or group medical service agreement that shall be delivered, issued or renewed in the commonwealth shall provide as a benefit for all individual subscribers or members within the commonwealth and all group members having a principal place of employment within the commonwealth, coverage for a bone marrow transplant or transplants for persons who have been diagnosed with breast cancer that has progressed to metastatic disease; provided, however, that said person shall meet the criteria established by the department of public health. The department of public health shall promulgate rules and regulations establishing criteria for eligibility for coverage hereunder which shall be consistent with medical research protocols reviewed and approved by the National Cancer Institute.