Medigap
noun[U]
INSURANCEuk/ˈmedɪɡæp/usin the US,privatemedicalinsurancethathelpstopayfor thedifferencebetween theamountthat thegovernmentprogramMedicarepaysand thecostoftreatment:
Thesharpincreasesin Medigapinsurancepremiumsare athreateningprospectforolderAmericans.
Medigap coverage/policies/plansMedicalservicesthat arecoveredby Medigapplansarecoveredat 100%.