Drug addiction and alcoholism affects many elderly individuals and senior citizens, and this situation is going to only get worse in the near and distant future. senior citizens who are insured through the Medicare plan, a health insurance plan funded through the federal funding for people in this age group, may use their health insurance to take part in critical rehabilitation services for substance abuse at a number of alcohol and drug treatment programs throughout the Brentwood, CA. area. Medicare will cover the costs of both residential and outpatient alcohol and drug treatment centers, and senior citizens in Brentwood, California that decide to get rehab should consult with their primary care physician to choose a Brentwood, CA. alcohol and drug rehabilitation center who accepts Medicare which will be workable for them.