Medicare Supplement Insurance (Medigap) is primarily designed to cover costs not covered by which parts of Medicare?

Medicare Supplement Insurance, commonly known as Medigap, is specifically designed to cover healthcare costs that are not fully covered by Part A and Part B of Medicare. These include out-of-pocket expenses such as copayments, coinsurance, and deductibles that beneficiaries may incur while receiving treatment.

Part A covers hospital stays and some inpatient services, while Part B covers outpatient care and doctor visits. Although Medicare provides comprehensive coverage, there are still gaps in the benefits that can leave beneficiaries responsible for significant out-of-pocket costs. Medigap policies help mitigate these expenses by filling in the gaps, making healthcare more manageable for those who rely on Medicare.

The other options listed involve different combinations of Medicare parts that do not accurately reflect the primary purpose of Medigap. For instance, Part C refers to Medicare Advantage plans, which are not addressed by Medigap, and Part D pertains to prescription drug coverage, which is also not covered by Medigap policies. Hence, the correct answer, recognizing where Medigap applies, is indeed linked to Parts A and B.