Is Medigap Covered Under Medicare Advantage? 
No . Medigap is health insurance which works as a supplement to original Medicare -LRB- Parts A and B -RRB- . Medicare Advantage is a private health insurance plan offered by an insurance company that provides health insurance to Medicare beneficiaries that is at least as good as original Medicare -LRB- Parts A and B -RRB- . You may not have both Medigap insurance and a Medicare Advantage Plan at the same time . 