Even though it’s definitely something to cheer about, it is very important to remember that your Original Medicare (Part A and B) together still only cover 80% of your healthcare costs, and they both have deductibles and coinsurance.  Put simply, your Original Medicare does not cover all of your healthcare costs by itself.  Most people choose to add a Medicare Supplement plan, a prescription drug plan, or enroll in a Medicare Advantage plan to help cover the deductibles and coinsurance that Original Medicare does not.