(a)(1) The annual assessment imposed under this article shall be due and payable on a quarterly basis during the first 15 business days of each quarter.

(2) Notwithstanding subdivision (1), the installment payment of an assessment imposed by this article shall not be due and payable until:

a. The department issues the written notice required by this article stating that the payment methodologies to privately operated hospitals required under this article have been approved by the Centers for Medicare and Medicaid Services and the waiver under 42 C.F.R. §433.68 for the assessment imposed by this article, if necessary, has been granted by the Centers for Medicare and Medicaid Services, or if approval for the State Plan Amendment and the waiver under 42 CFR §433.68 for the assessment imposed by this article, if necessary, is delayed for any reason, the payment shall be recalulated by Medicaid upon actual approval; and

b. The 30-day verification period required by this article has expired; and

c. Medicaid has made all disproportionate share payments for the quarter, consistent with the effective date of the approved state plan amendment and waiver.

(3) After the initial installment has been paid under this section, each subsequent quarterly installment payment of an assessment imposed by this article shall be due and payable during the first 15 business days of the quarter, or if approval for the State Plan Amendment and the waiver under 42 CFR §433.68 for the assessment imposed by this article, if necessary, is delayed for any reason, the payment shall be recalculated by Medicaid upon actual approval.

(b) The payment by a privately operated hospital of the assessment created in this article shall be reported as an allowable cost for Medicaid reimbursement purposes.

(c)(1) If a privately operated hospital fails to pay the full amount of a quarterly assessment by the fifteenth business day of the quarter, the department shall add to the assessment:

a. A penalty assessment equal to five percent of the quarterly amount not paid on or before the due date; and

b. On the last day of each quarter after the due date until the assessed amount and the penalty imposed under this section are paid in full, an additional five percent penalty assessment on any unpaid quarterly and unpaid penalty assessment amounts.

(2) Payments shall be credited first to unpaid quarterly amounts, rather than to penalty or interest amounts, beginning with the most delinquent installment.