Medicaid managed care matters. Establishes the joint commission on Medicaid oversight with the authority to meet throughout the year. Sets forth responsibilities of the commission. Repeals a statute specifying that Medicaid laws, with respect to managed care organizations, are controlling over insurance laws. Prohibits the office of Medicaid policy and planning or a contractor of the office from denying, delaying, or decreasing the amount of payment for a medically necessary covered service based on a lack of eligibility or coverage if the Medicaid provider meets certain requirements. Requires the secretary of the office of family and social services to adopt rules establishing a dispute resolution procedure for disputes between Medicaid providers and Medicaid contractors.