Within fifteen days after an insurer's receipt of notice of claim by a claimant under a general or blanket policy of accident and sickness insurance which is delivered or issued for delivery in the commonwealth, and which provides hospital expense, medical expense, surgical expense or dental expense insurance, the insurer shall furnish such forms as are usually furnished by it for filing proofs of loss. Within forty-five days from said receipt of notice if payment is not made the insurer shall notify the claimant in writing specifying the reasons for the nonpayment or whatever further documentation is necessary for payment of said claim within the terms of the policy. If the insurer fails to comply with the provisions of this paragraph, said insurer shall pay, in addition to any benefits which inure to such claimant or provider, interest on such benefits, which shall accrue beginning forty-five days after the insurer's receipt of notice of claim at the rate of one and one-half percent per month, not to exceed eighteen percent per year. The provisions of this paragraph relating to interest payments shall not apply to a claim which an insurer is investigating because of suspected fraud.
"Carrier", a health maintenance organization authorized under chapter 176G, an insurance company authorized to provide accident and health insurance under this chapter, a nonprofit hospital service corporation authorized under chapter 176A, a nonprofit medical service corporation authorized under chapter 176B, or any other entity responsible for the payment of benefits or provision of services under a group contract.
"Replacement", the benefits provided by a succeeding carrier.
"Discontinuance", the termination of the contract between the group contract holder and a health maintenance organization authorized under chapter 176G due to the insolvency of the health maintenance organization. The word "discontinuance" does not refer to the termination of any agreement between any individual enrollee and the health maintenance organization.
Mass. Gen. Laws ch. 175, § 110