Mass. Gen. Laws ch. 6D, § 15
(c) The commission may establish additional standards for an ACO. In developing additional standards for ACO certification, the commission shall consider the following goals for ACOs:
(f) All ACOs shall publish the standards used by the ACO to determine which providers of free-standing ancillary services shall be approved to provide services to ACO patients. Free-standing ancillary services shall include, but shall not be limited to, durable medical equipment services, laboratory services, imaging services, dialysis centers, and services provided by free-standing diagnostic, non-hospital surgery centers. A provider of these services shall be informed in writing by the ACO of the standards by which they were accepted or rejected as an approved provider of these free-standing ancillary services for ACO patients.
The commission shall create a review process for aggrieved providers under this subsection that are denied approval by an ACO as a provider of free-standing ancillary services for ACO patients. For such process, the commission may review the following: (1) a comparison of the costs of services between an aggrieved provider and the costs of services provided within the ACO; (2) a comparison of the quality of services between an aggrieved provider and the quality of services provided within the ACO; (3) a comparison of the efficiency of services between an aggrieved provider and efficiency of services provided within the ACO; and (4) the extent to which the aggrieved provider meets the published standards used by the ACO to determine inclusion as an approved provider for ACO patients.