Dual-eligible, Special Needs Medicare Advantage plans (D-SNPs) have been a popular, growing trend in the Medicare Advantage (MA) marketplace over the past several years. Generally, D-SNPs are MA plans that are geared to meet the unique needs of beneficiaries that are dually eligible for both Medicare and Medicaid. Since 2018, the number of D-SNP plans has increased 52% and enrollment in D-SNP plans has grown at an average annual rate of 15.8%. This brief begins a series intended provide insight into some of the key differences between D-SNP and general enrollment plans.