Mass. Gen. Laws ch. 176B § 4ZZ
Any subscription certificate under an individual or group medical service agreement delivered, issued or renewed within the commonwealth shall provide coverage for universal postpartum home visiting services, in accordance with operational standards set by the department of public health pursuant to section 248 of chapter 111. Such coverage shall not be subject to any cost-sharing, including co-payments and co-insurance, and shall not be subject to any deductible; provided, however, that co-payments, coinsurance or deductibles shall be required if the applicable plan is governed by the Internal Revenue Code and would lose its tax-exempt status due to the prohibition on co-payments, coinsurance or deductibles for these services.
Mass. Gen. Laws ch. 176B, § 176B:4ZZ