In most cases, Medicare is a federal health insurance program for people 65 years old or over and for certain disabled people under 65 years of age. You are automatically enrolled in Medicare hospital insurance (Part A) when you apply for Social Security benefits – usually upon reaching 65 years of age. Part A covers inpatient care in a hospital or a limited stay in a skilled nursing facility. Part B covers physician and outpatient hospital services. The premium you pay for Part B is deducted from your Social Security benefits.
Medicare pays for many healthcare services and supplies, but it doesn't cover all of your healthcare costs. For example, you pay a deductible for each hospital stay and coinsurance anytime you use the services of a physician or surgeon. Also, drug coverage is limited. Because Medicare rarely pays the full cost of covered services, you may want to consider a Medicare Advantage or Medicare Supplement insurance plan.