To be eligible for Medicare benefits, you must generally be 65 years old and either a United States citizen or a legal permanent resident who has lived in the U.S. for at least five continuous years. Medicare benefits are also available to individuals under 65 with certain disabilities and people of any age with End-Stage Renal Disease (ESRD) or Amyotrophic Lateral Sclerosis (ALS). The process for enrolling in Medicare typically begins three months before you turn 65 and extends for seven months. This initial enrollment period is crucial for ensuring you don't face penalties for late enrollment. It's important to understand the different parts of Medicare, including Part A (hospital insurance), Part B (medical insurance), Part C (Medicare Advantage), and Part D (prescription drug coverage). Each part provides different benefits, and you have the option to choose the coverage that best suits your needs. For more specific details about eligibility and enrollment, it's advisable to contact the Social Security Administration or visit the official Medicare website for personalized guidance and assistance.