NV Rev Stat §695C.185(1)

(1) Except as otherwise provided in subsection 2, a health maintenance organization shall approve or deny a claim relating to a health care plan within 30 days after the health maintenance organization receives the claim. If the claim is approved, the health maintenance organization shall pay the claim within 30 days after it is approved. Except as otherwise provided in this section, if the approved claim is not paid within that period, the health maintenance organization shall pay interest on the claim at a rate of interest equal to the prime rate at the largest bank in Nevada, as ascertained by the Commissioner of Financial Institutions, on January 1 or July 1, as the case may be, immediately preceding the date on which the payment was due, plus 6 percent. The interest must be calculated from 30 days after the date on which the claim is approved until the date on which the claim is paid.