Medicare is a form of health care insurance developed by the U.S. government for seniors, and also people with certain disabilities and sicknesses. If an individual who has Medicare needs treatment for instances of substance abuse, their rehabilitation will be either covered entirely by their Medicare health insurance or to a significant extent. The only exception is, the person will have to receive treatment from the drug rehab facility which accepts Medicare. Before the individual will be permitted to begin rehabilitation, they will 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 rehabilitation the individual will do. Medicare Part An and Part B cover a variety of rehab providers. Part A pays for an inpatient stay in a Medicare accepted program when the individual needs to be in a hospital for his or her issue, along with the costs that they will have to cover personally are the same as every other hospital stay. Medicare Part B will partially cover outpatient rehabilitation in the Medicare accepted program, and the individual will need to cover whatever Medicare Part B doesn't pay for with supplement insurance coverage or they're going to have to self pay.