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You’ve had the same Medicare plan for years, your prescriptions are covered, and your doctor still accepts your insurance, so why bother changing anything? Because the coverage that worked perfectly in 2026 could cost you hundreds of dollars more in 2027, even if your health hasn’t changed. Medicare Advantage and Part D plans can adjust premiums, deductibles, prescription coverage, provider networks, and other benefits each year. Unfortunately, many retirees don’t discover those changes until they receive an unexpected bill or arrive at the pharmacy in January. With Medicare Open Enrollment underway through December 7, now is the time to compare your options. Here are seven warning signs that your current coverage deserves a closer look.