Awasome Medigap Plan D References. Web purchasing a medigap plan and a medicare part d prescription drug plan could give you more complete coverage. Web medigap is a supplemental insurance policy sold by private companies that can be used along with medicare parts a and b to fill the gaps in their coverage.

To get your number, check your my social security account at ssa.gov or your. It can help you cover. Medigap isn’t your only supplemental insurance option.