CMS received information that a prior instruction (CR3504) did not specifically mention all of the changes that were made to the “Medicare Secondary Payer (MSP) Questionnaire.” CR4098 identifies all of the changes made as part of CR3504 and makes additional changes to the model questionnaire. The official instructions issued to your Medicare carrier or intermediary regarding this change and the model questionnaire can be found at http://www.cms.hhs.gov/manuals/transmittals/comm_date_dsc.asp on the CMS web site.