Drug and alcohol rehab centers which are covered by Medicare can be found in almost all parts of the country, and this health insurance coverage typically makes individuals eligible for both inpatient and outpatient drug and alcohol rehabilitation facilities. The only rules of thumb are that the need to receive services in a drug and alcohol treatment program must be considered medically necessary by the person's doctor and the person's doctor is required to help set up their drug rehab plan. Due to the fact that there are health screenings which have been put into the system by Medicare in liaison with physicians who treat older Americans, early detection has been helpful in getting older Americans into an appropriate alcohol and drug treatment facility in Napa, California that is covered through their Medicare insurance coverage. This has helped many seniors thoroughly address addiction issues and eventually overcome substance abuse for good so that they can can enjoy the duration of their lives without risk relapse.