The Dual-Eligible and Part D Low-Income Subsidy programs help low-income Medicare beneficiaries cover healthcare and prescription costs. However, information on the sociodemographic characteristics of eligible Medicare beneficiaries for both programs is limited. The 2017-2023 Medicare Current Beneficiary Survey Public Use Files, a nationally representative dataset of Medicare beneficiaries aged ≥65 years (Ns: ranged from 10,186-11,278), were used for this repeated cross-sectional study. A three-