Abstract

Diabetes mellitus remains a major global public health challenge, with persistent and pervasive disparities in care 
contributing substantially to unequal health outcomes. Health disparities in diabetes care are evident across racial 
and ethnic groups, socioeconomic strata, and geographic regions, influencing disease incidence, timeliness of 
diagnosis, access to care, quality of treatment, and long-term outcomes. Despite advances in clinical management 
and expanded insurance coverage in many settings, inequities in diabetes prevention, treatment, and complication 
management continue to compromise glycemic control and increase morbidity and mortality among marginalized 
populations. This narrative review synthesizes current evidence on health disparities in diabetes care, drawing on 
epidemiologic data, conceptual frameworks grounded in the social determinants of health, and studies examining 
access to care, service utilization, and quality of care, patient experience, and adherence. The review highlights 
how structural, social, and systemic factors, including income, education, insurance status, discrimination, 
geographic location, and health system organization interact to shape diabetes outcomes across diverse 
populations. Particular attention is given to racial and ethnic minority groups and individuals of lower 
socioeconomic status, who experience disproportionate barriers throughout the diabetes care continuum. The 
findings underscore the need for multilevel interventions that extend beyond clinical settings to address upstream 
determinants of health. Community-based programs, system-level reforms, and pro-equity public policies show 
promise but remain insufficiently evaluated for their equity-specific impact. Strengthening data collection, 
adopting equity-sensitive metrics, and integrating social determinants into diabetes care delivery are essential for 
advancing equitable outcomes and reducing the burden of diabetes across populations.