Medicaid is a type of health insurance available for those who are in certain income brackets which qualifies them to obtain this government provided insurance. Whether an individual qualifies for Medicaid doesn't only depend upon income however, and people shouldn't assume they don't qualify simply because they earn a good income. For example, people who have many dependents may qualify for Medicaid even if they make what would be considered a fair income. Medicaid can also cover the costs of rehab, if a person has been abusing drugs or alcohol and requires rehab. There are lots of drug rehab centers which accept Medicaid, but various states have distinct rules for what kinds of treatment are covered. Some states only include outpatient rehabilitation services for instance while other states cover far more extensive rehab say for example a residential stay in long-term alcohol and drug treatment facility. If someone is involved in drug use and wants help, they could use their Medicaid insurance coverage to acquire this help. If they don't have Medicaid and also don't have enough cash or some other kind of health insurance to pay for rehab, they could find out if they are eligible for a Medicaid and then enroll in a drug rehab program which is approved in their state.