This document provides information about Medicare, including its four parts (A, B, C, and D) and enrollment details. Medicare is a federal health insurance program for Americans aged 65 and older and younger people with disabilities. Part A covers inpatient hospital care, skilled nursing facilities, and hospice. Part B covers outpatient care and preventative services. Part C are Medicare Advantage plans offered by private insurers. Part D provides prescription drug coverage. The document outlines enrollment periods, premium costs, coverage details, and penalties for late enrollment across the different parts of Medicare.