Medicare.gov is the official U.S. government site for Medicare and includes information about Medicare coverage, eligibility, enrollment, costs and much more. Use this helpful guide to navigate your way around Medicare.gov and find the information you need. Learn about Medicare enrollment, costs, supplemental coverage, and plan choices. This section has information about Original Medicare, Medicare Advantage, and Part D. Medicare is a health insurance program for: People age 65 or older. People under age 65 with certain disabilities. People of all ages with End-Stage Renal Disease (permanent kidney failure requiring dialysis or a kidney transplant). Generally, Medicare is for people 65 or older. You may be able to get Medicare earlier if you have a disability, End-Stage Renal Disease (permanent kidney failure requiring dialysis or a transplant), or ALS (also called Lou Gehrig’s disease). It started in 1965 under the Social Security Administration and is now administered by the Centers for Medicare and Medicaid Services (CMS). Medicare is divided into four parts: A, B, C, and D. Part A covers hospital, skilled nursing, and hospice services. Part B covers outpatient services. Learn the official 2026 Medicare costs for Parts A, B, C, and D, including premiums, deductibles, IRMAA income brackets, and out-of-pocket limits. Learn how Medicare works for people 65 and older or with a disability. See if you are eligible, how to enroll, and locate a Medicare-certified provider. The official U.S. government website for Medicare, a health insurance program for people age 65 or older and younger people with disabilities. Medicare is our country’s health insurance program for people age 65 or older. You’ll sign up for Medicare Part A and Part B through Social Security, so you can make both retirement and Medicare choices and withhold any premiums from your benefit payments. Medicare is a federal health insurance program for people over 65. AARP makes Medicare easy with information on coverage, benefits, costs and more.