Ariz. Rev. Stat. § 36-2987
C. For services rendered on and after October 1, 1998, the administration and the contractors shall pay a hospital's rate established according to this section subject to the following:
G. On oral or written notice from the member, or the member's parent or legal guardian, that the member, parent or legal guardian believes a claim should be covered by the program, a contractor or noncontracting provider shall not do either of the following unless the contractor or noncontracting provider has verified through the administration that the person is ineligible for the program, has not yet been determined eligible or, at the time services were rendered, was not eligible or enrolled in the program: