To compare trends in Medicaid expenditures among adults with diabetes who were newly eligible due to the Affordable Care Act (ACA) Medicaid expansion to trends among those previously eligible.
RESEARCH DESIGN AND METHODSUsing Oregon Medicaid administrative data from 1 January 2014 to 30 September 2016, a retrospective cohort study was conducted with propensity score-matched Medicaid eligibility groups (newly and previously eligible). Outcome measures included total per-member per-month (PMPM) Medicaid expenditures and PMPM expenditures in the following 12 categories: inpatient visits, emergency department visits, primary care physician visits, specialist visits, prescription drugs, transportation services, tests, imaging and echography, procedures, durable medical equipment, evaluation and management, and other or unknown services.
RESULTSTotal PMPM Medicaid expenditures for newly eligible enrollees with diabetes were initially considerably lower compared with PMPM expenditures for matched previously eligible enrollees during the first postexpansion quarter (mean values $561 vs. $793 PMPM, P 5 0.018). Within the first three postexpansion quarters, PMPM expenditures of the newly eligible increased to a similar but slightly lower level. Afterward, PMPM expenditures of both groups continued to increase steadily. Most of the overall PMPM expenditure increase among the newly eligible was due to rapidly increasing prescription drug expenditures.
CONCLUSIONSNewly eligible Medicaid enrollees with diabetes had slightly lower PMPM expenditures than previously eligible Medicaid enrollees. The increase in PMPM prescription drug expenditures suggests greater access to treatment over time.The prevalence of diabetes in the population has increased substantially in the U.S. In 2017, more than 30 million people were diagnosed with this condition, more than twice as many as compared with 20 years ago (1-3). The economic costs associated with the condition are substantial, reaching around $327 billion in 2017 (4). Among people without health insurance coverage, diabetes is more likely to remain undiagnosed and untreated, and uninsured populations also have less health care access and lower utilization than insured populations (5-8). Therefore, gaining health insurance is likely to improve treatment and well-being among people with diabetes.