Disposition Instructions When Medicare Records are Microfilmed

30.30.1.2 - Disposition Instructions When Medicare Records are Microfilmed (Rev. 38, Issued: 05-26-06, Effective: 06-26-06, Implementation: 06-26-06) Paper Records All paper claims that are microfilmed must be retained until CMS notifies you the freeze is lifted. Microform Records The master microform must be retained until CMS notifies you the freeze is lifted.