Medicare Part B is outpatient medical coverage. Part B helps pay for medically necessary services performed on an outpatient basis that are needed to diagnose and treat a medical condition.
Visits to your Primary Care Physician, Specialists, Surgeries, lab work, and preventative services are all covered under Part B. There is a monthly premium that you would be responsible for that will be withdrawn directly from your Social Security check if you are drawing Social Security. Otherwise you would need to pay the premium 3 months at a time from your checking account.
There is a once a year deductible that you would have to meet before Part B pays anything, then it is a 80/20 split where you would be responsible for 20% of the costs of service.