Medicaid is a kind of health care insurance available for those who are in specific income brackets which qualifies them to obtain this government funded insurance. Whether a person qualifies for Medicaid doesn't only depend upon their earnings however, and people shouldn't presume they don't qualify because they earn a good income. For example, people who have many dependents may be eligible for Medicaid even when they earn what would be considered a reasonable income. Medicaid could also cover the costs of rehab, if a person has been abusing drugs or alcohol and needs treatment. There are many alcohol and drug treatment programs which accept Medicaid, but various states have different guidelines for what forms of treatment are covered. Some states only cover outpatient rehab services for example while other states cover far more extensive rehab such as a residential stay in long-term drug treatment facility. If anyone is involved in drug abuse and wants help, they're able to use their Medicaid insurance coverage to get this help. If they don't have Medicaid and in addition don't have enough cash or some other type of medical insurance to pay for rehabilitation, they could find out if they are eligible for a Medicaid and then enroll in a drug rehabilitation program that's approved in their state.