Any communication between an allied mental health or human services professional and a client shall be deemed to be confidential. Said privilege shall be subject to waiver only in the following circumstances:
The provisions of this section shall not be construed to prevent third party reimburser from inspecting and copying, in the ordinary course of determining eligibility for or entitlement to benefits, any and all records relating to diagnosis, treatment or other services provided to any person, including a minor or incompetent, for which coverage, benefit or reimbursement is claimed, so long as the policy or certificate under which the claim is made provides that such access to such records is permitted. The provisions of this section shall not be construed to prevent access to any such records pursuant to any peer review or utilization review procedures applied and implemented in good faith.
Mass. Gen. Laws ch. 112, § 172