Massachusetts General Laws Part I. Administration of the Government (Ch. 1-182) Ch. 176G, § 22

(1) a member of a health maintenance organization shall not be liable to any health care provider for any covered health services provided to the member, except as provided in subsection (c);

(2) a health care provider or any representative of a health care provider may not collect or attempt to collect from a member money owed to the health care provider by a health maintenance organization;

(3) a health care provider or any representative of a health care provider may not maintain any action against a member to collect or attempt to collect any money owed to the health care provider by a health maintenance organization.

(1) a co-payment, deductible, or co-insurance amounts owed by the member to the health care provider for covered services provided by the health care provider, or

(2) a payment or charges for services not covered under the member's health maintenance contract.