Should I ENROLL in Part A or Bif I have health insurance at work? Do I need a PART D plan if I have employer sponsored insurance? What if myemployer plan is a HSA? If you enroll in B while workingbut delay buying a Supplement Medicare Rulesabout COBRA Who pays first?Medicare or my Group Plan? Medicare with INDIVIDUALor Marketplace Insurance What if I don't takePart B at age 65? Click to ENROLLin Part B Now