Mr. Xi will soon turn age 65, which makes him eligible for Medicare. Original Medicare (Parts A and B) provides health coverage primarily for hospital and medical services. Beneficiaries under Original Medicare generally have no cost-sharing for most preventive services, including immunizations such as annual flu shots. However, Medicare Part B typically requires paying a standard monthly premium, which may vary based on income. Additionally, Medicare is not income-based; eligibility is primarily age or disability- related. If Mr. Xi has employer coverage, Medicare coordination rules depend on the size of the employer group plan. For smaller employers (fewer than 20 employees), Medicare usually becomes the primary payer once the individual turns 65. Medicare Supplemental Insurance (Medigap) can help cover deductibles and coinsurance not paid by Original Medicare but only works with Original Medicare, not Medicare Advantage plans