No, there is no single Medicare plan that covers 100% of all healthcare expenses. Even the most robust coverage configurations leave beneficiaries with certain out-of-pocket responsibilities. While pairing Original Medicare with a standardized Medigap Plan G covers nearly all leftover out-of-pocket medical costs (such as deductibles, coinsurance, and copayments outside of the annual Part B deductible), it still does not cover long-term custodial nursing home care, routine dental, vision, or hearing exams.