Rate adjusters for Medicare under capitation

Area of Science:

• Health Economics
• Healthcare Policy
• Medicare

Background:

• Capitation models in healthcare are complex.
• The average adjusted per capita cost (AAPCC) is a key metric for Medicare capitation.
• Current AAPCC calculations face challenges with risk mix and geographic variation.

Purpose of the Study:

• To identify and address critical issues within the current AAPCC estimation process.
• To propose improvements for more accurate and equitable Medicare capitation.
• To ensure patient access to care within alternative delivery systems under capitation.

Main Methods:

• Analysis of existing AAPCC calculation methodologies.
• Exploration of statistical techniques like shrinkage estimators.
• Evaluation of risk adjustment factors and their impact on cost estimation.

Main Results:

• The AAPCC is sensitive to the risk mix within the fee-for-service system.
• Significant geographic variations exist in current AAPCC estimates.
• Existing adjusters do not sufficiently create homogeneous risk classes.

Conclusions:

• Enhanced adjusters for AAPCC are necessary for accurate risk assessment.
• Shrinkage estimators show potential for reducing geographic variance in AAPCC.
• A combination of capitation and fee-for-service may be preferable until AAPCC improvements are implemented to prevent access issues.