New federal rules released in April 2019 require that Dual Eligible Special Needs Plans (D-SNPs) must, at a minimum, coordinate the delivery of Medicare and Medicaid benefits. The final rule includes new regulatory language effective January 1, 2020 and provides examples of ways that D-SNPs should coordinate their members’ Medicare and Medicaid services. This technical assistance brief discusses techniques that states can use to share information about Medicaid enrollment and service use with D-SNPs, in order to support D-SNPs in meeting the coordination requirement.