Medicaid is a government-run health insurance program in the United States that provides coverage for low-income individuals and families. It is jointly funded by the federal and state governments, and each state operates its own Medicaid program within federal guidelines. Medicaid covers a wide range of health services, including doctor visits, hospital stays, prescription drugs, and long-term care for individuals who meet certain income and eligibility requirements. The program aims to ensure that low-income and vulnerable populations have access to necessary healthcare services. Research in this area often focuses on evaluating the impact of Medicaid on health outcomes, access to care, and healthcare costs for eligible individuals.