Medicaid is a health care insurance available for individuals who are in specific income brackets which qualifies them to receive this government funded insurance coverage. Whether or not a person qualifies for Medicaid doesn't only depend on their earnings however, and people shouldn't assume they don't qualify simply because they earn a reasonable income. As an example, people who have many dependents may be entitled to Medicaid even if they earn what would be described as a fair income. Medicaid may also cover the expenses of rehab, if someone has been abusing alcohol or drugs and needs rehabilitation. There are many drug rehabilitation programs which accept Medicaid, but various states have distinct guidelines for what types of rehab are covered. Some states only cover outpatient rehab services for instance while other states cover far more extensive rehabilitation such as a residential stay in long-term alcohol and drug rehabilitation center. If someone is involved with substance abuse and wants help, they're able to use their Medicaid health coverage to get this treatment. If they don't have Medicaid and also don't have the cash or any other form of health insurance to cover rehabilitation, they can check if they qualify for Medicaid and then enroll in a drug and alcohol rehabilitation center that's approved in their state.