As Medicaid marks its 50th year, the program has unquestionably become the mainstay of health coverage for low-income women in the nation. Since its inception, its role for women has continued to evolve and expand, but the passage of the Affordable Care Act (ACA) swung open the doors for Medicaid to serve even more low-income women who lack access to private or employer-based insurance. This is because the ACA enabled states to finally eliminate Medicaid's historical “categorical” requirements, which had essentially shut out women and men without dependent children.