This chapter shall not apply to managed care programs operated under contract with the federal government under title XVIII of the federal social security act, as amended (medicare), or under contract with a plan otherwise exempt from operation of this chapter pursuant to the employee retirement income security act of 1974, as amended (ERISA). This chapter shall not apply to programs administered by the department of health and welfare under contract with the department of health and welfare under title XIX of the federal social security act, as amended (medicaid) or under programs administered by the department of health and welfare substance use disorder bureau or its contracted managed care organization.