Medicare is a form of medical health insurance created by the government for senior citizens, along with people who have certain disabilities and diseases. If someone who has Medicare needs rehabilitation for cases of drug or alcohol abuse, their rehabilitation will be either covered completely by their Medicare insurance or to a great degree. The only real exception is, the person will have to acquire treatment from the drug rehab facility which accepts Medicare. Before the individual will be permitted to begin rehabilitation, they will also have to see their doctor who must declare that treatment services are medically necessary, and the physician will typically approve which kind of rehab the individual will do. Medicare Part An and Part B cover a variety of rehabilitation services. Part A pays for an inpatient stay in a Medicare accepted program when the individual has to be hospitalized for his or her problem, as well as the costs that they will have to cover personally are the same as every other stay in a hospital. Medicare Part B will partly cover outpatient rehab inside a Medicare accepted center, and the individual will need to cover whatever Part B doesn't cover with supplement insurance coverage or they will have to self pay.