Additional Processing Instructions

310.2 - Additional Processing Instructions (Rev. 4, 10-01-01) For further information on how to implement this Medicare secondary payer provision, refer to §§3490.3 - 3490.16 of the Intermediary Manual. These sections include, among other things, information regarding the implementation of this provision retroactively, the processing of current claims, the determination of the 18-month period in which Medicare may be secondary, and the method of calculating the Medicare secondary payment.