When a fair hearing decision has ordered the correction of a discontinuance, the correction of a denial of an application for benefits or the correction of the amount of cost-sharing responsibilities, a payment shall be made to the appellant to cover the full amount to which he/she was entitled in accordance with the decision for the entire period from the date the incorrect action was taken.
N.Y. Comp. Codes R. & Regs. Tit. 9 § 9750.4