Medicaid is a type of medical insurance available for those who are in certain income brackets which qualifies them to receive this government provided insurance. Whether or not someone qualifies for Medicaid doesn't only depend upon income however, and people shouldn't assume they don't qualify simply because they make a fair income. As an example, people who have many dependents may be entitled to Medicaid regardless of whether they make what can certainly be a fair income. Medicaid may also cover the costs of rehab, when someone has been abusing alcohol or drugs and requires rehab. There are many drug rehab centers which accept Medicaid, but different states have distinct rules for what forms of treatment are covered. Some states only include outpatient treatment services for example while other states cover far more intensive rehabilitation say for example a residential stay in long-term alcohol and drug rehabilitation center. If a person is involved in drug use and needs help, they can use their Medicaid health coverage to obtain this treatment. If they don't have Medicaid plus don't have the cash or some other kind of medical insurance to cover treatment, they can check if they qualify for Medicaid and then enroll in an alcohol and drug rehabilitation facility that's approved in their state.