Background How to Use Appendix Interactive Map Comparison Table Resources Scientific Papers Legislating Medicaid: Considering Medicaid and Its Origins Medicare and Medicaid: The Past as Prologue Issue Briefs Medicaid Financing: The Basics Medicaid’s Role in Improving Substance Use Disorder Treatment Medicaid Physician Fees Remained Substantially Below Fees Paid By Medicare In 2019 Websites Medicaid & CHIP Enrollment Data Highlights