; and (II) place priority on prior authorization of items that are subject to a high number of contractor audits. (E) Prior authorization process for home respiratory therapy (i) In general In the case of home respiratory therapy (as defined in clause (v)) furnished on or after January 1, 2019, the Secretary shall establish and implement a process under which the Secretary shall determine, in advance of furnishing such therapy to an individual, whether payment for such therapy may not be made under this title because such therapy is not covered under this title or because of the application of section 1862(a)(1). (ii) Elements of process Under the process described in clause (i), with respect to home respiratory therapy for an individual, the following shall apply: (I) In order to obtain a prior authorization under such process, the prescribing practitioner (as defined by the Secretary) prescribing such therapy for such individual shall submit, for such therapy and individual— (aa) a prescription; (bb) in the case of home respiratory therapy that is oxygen or oxygen equipment, a certificate of medical necessity