Drug addiction and alcoholism affects many older Americans and seniors, and this problem is projected to only worsen in the coming years. Seniors who are covered through the Medicare program, an insurance program funded through the federal government for Americans in this age bracket, can use their benefits to receive treatment services for addiction at a variety of substance abuse rehab centers around the country. Medicare covers both inpatient and outpatient rehabilitation facilities, and seniors who are in need of treatment can consult with their primary care physician to choose a treatment program covered by Medicare which would fit his or her particular needs.