Medicare and Medicaid Dual-Eligible Enrollment and Spending Trends

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While these beneficiaries make up a minority of total enrollment, they account for a disproportionate share of spending in both programs due to higher rates of chronic illness and the need for long-term care services.

Enrollment Trends and State-Level Variation

The prevalence of dual eligibility varies significantly across the United States, driven by differences in state-level income distribution, age demographics, and Medicaid eligibility criteria. According to KFF analysis, dual-eligible individuals comprise at least 30% of all Medicare beneficiaries in jurisdictions including the District of Columbia, New York, Connecticut, and Louisiana. In contrast, Utah reports the lowest share at 11%.

For Medicaid, the reliance on dual-eligible enrollees is most pronounced in Maine and Mississippi, where they represent at least 20% of the total program population. Conversely, in states like Colorado, Alaska, and Utah, dual-eligible individuals account for less than 10% of Medicaid enrollment.

Disproportionate Impact on Program Spending

Dual-eligible beneficiaries drive a substantial portion of federal and state health care expenditures. While they represent 15% of the traditional Medicare population, they account for 29% of traditional Medicare spending, totaling $127 billion, per KFF.

The financial footprint is even larger within Medicaid. Dual-eligible individuals make up 13% of total Medicaid enrollment but consume 30% of the program’s total spending, equivalent to $241 billion. This spending imbalance occurs because Medicare and Medicaid spend significantly more per person on full-benefit dual-eligible individuals than on other enrollees. Traditional Medicare spends an average of $24,811 per full-benefit dual-eligible person, compared to $10,413 for beneficiaries without Medicaid.

Chronic Conditions and Long-Term Care Needs

A primary driver of these costs is the higher prevalence of chronic disease. According to KFF, 57% of full-benefit dual-eligible individuals live with five or more chronic conditions, compared to 47% of other Medicare beneficiaries and only 2% of Medicaid-only enrollees.

Spending patterns correlate directly with the severity of these health profiles. Among full-benefit dual-eligible individuals in traditional Medicare, average Medicare spending rises from $3,955 for those with no chronic conditions to $40,341 for those with five or more.

Medicaid spending also shifts based on the need for long-term care. Because Medicare generally does not cover long-term services and supports, Medicaid fills this gap, accounting for nearly one-third of its total spending. Over 60% of Medicaid enrollees who utilize long-term care are dual-eligible individuals, and spending for these beneficiaries is eight times higher than for enrollees who do not require such care.

Key Takeaways

• High Utilization: Full-benefit dual-eligible individuals often have better access to care than other beneficiaries because Medicaid covers Medicare cost-sharing requirements, effectively removing financial barriers to treatment.
• Diverse Benefits: This population benefits from additional services not covered by standard Medicare, such as case management and non-emergency medical transportation.
• Demographic Factors: The high rate of chronic conditions among dual-eligible individuals is linked to the older age of the Medicare population, whereas the Medicaid-only population is largely comprised of children and parents under age 65 who typically have lower per-enrollee costs.