Medicare is a form of medical insurance developed by the government for seniors, and also those that have specific disabilities and illnesses. When someone who has Medicare needs rehabilitation for instances of substance abuse, their treatment will either be covered entirely by their Medicare health insurance or to a significant extent. The only real exception is, the person will have to receive treatment from an alcohol and drugs rehab facility which accepts Medicare. Before the individual will be permitted to begin treatment, they may also have to visit their primary care physician who must state that treatment services are medically necessary, and the physician will generally approve which kind of treatment the person will do. Medicare Part An and Part B cover several types of rehabilitation services. Medicare Part A pays for an inpatient stay in a Medicare accepted center when the individual must be in a hospital for his or her problem, as well as the costs that they will have to pay for personally are the same as any other stay in a hospital. Medicare Part B will partially cover outpatient treatment within a Medicare accepted facility, and the individual will need to cover whatever Part B doesn't cover with supplemental insurance coverage or they're going to have to self pay.