under this subparagraph shall specify in a State's application under paragraph (4) the methodology the State will use for determining payment for the provision of such services. Such methodology shall not be limited to a per-member-per-month basis and may provide (as proposed by the State and subject to approval by the Secretary) for alternate models of payment. (6) Reports (A) State reports A State receiving payments under paragraph (5) shall, for the period of the demonstration project under this subsection, submit to the Secretary a quarterly report, with respect to expenditures for treatment of sickle cell disease and complications of sickle cell disease for which payment is made to the State under this subsection, on the following: (i) The specific activities with respect to which payment under this subsection was provided. (ii) The number of individuals enrolled under the State plan (or a waiver of such plan) who received treatment for sickle cell disease or complications related to sickle cell disease under the demonstration project compared to the estimated number of such individuals who would have otherwise received such services in the absence of such demonstration project. (iii) The number of individuals enrolled under the State plan (or waiver of such plan) who received treatment for sickle cell disease or complications related to sickle cell disease under the demonstration project who utilized the services beyond clinical sickle cell disease services, including mental health, ancillary and support services and the impact on their health outcomes, including emergency department visits and inpatient hospital stays. (iv) The reductions in inpatient days, reductions in emergency department visits, and reductions in the total cost of care compared to these metrics before the demonstration project was implemented. (v) Other matters as determined by the Secretary. (B) CMS reports (i) Initial report Not later than 18 months after the date of enactment of this subsection, the Administrator of the Centers for