; (5) the degree of subsidization that occurs from private insurers or hospitals sponsoring air ambulance providers or suppliers to cover inadequate payments under title XVIII or XIX of the Social Security Act and enable reasonable profitability; (6) the ratio of charges to Medicare reimbursement and the impact on beneficiary cost sharing of cost, utilization, and variation in air ambulance services; (7) appropriate financial or other incentives for the utilization of ground critical care transport where medically appropriate; (8) the degree to which a quality reporting and performance program based upon patient safety measures and clinical quality measures should be used in determining a value based payment model for suppliers and providers of air ambulance service; and (9) any other information deemed relevant and appropriate by the Medicare Payment Advisory Commission for the purposes of providing such recommendations.