(a) The commissioner may enter into agreements with the patient or a person liable for him pursuant to this chapter to assure the regular payment of fees. (b) The commissioner may collect bills not paid within sixty days of presentment or pursuant to agreement by the enforcement of liens, the initiation of suit against liable parties to recover amounts due, or the initiation of suit to enforce an agreement. (c) An action to collect fees due pursuant to this chapter shall commence within six years from the accrual of the cause of action. This cause of action accrues when the fees become due.
New York Legal Code