Insurer Retention of Stand-Alone Part D Plan Enrollees Switching to Medicare Advantage

Åsa Hartman; Jingwei Sun; Michael E. Chernew; J. Michael McWilliams

doi:10.1001/jamahealthforum.2026.1865

July 2, 2026JAMA Health ForumOpen Access

Insurer Retention of Stand-Alone Part D Plan Enrollees Switching to Medicare Advantage

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Key Points

This study aims to measure how many Medicare beneficiaries remain with the same insurer after switching to Medicare Advantage from stand-alone drug plans.
Cross-sectional design
Quantified retention rates of beneficiaries
Analyzed transitions from stand-alone drug plans to Medicare Advantage plans
Findings indicate a notable percentage of beneficiaries retained their original insurer despite switching plans.
Specific retention rates were observed, emphasizing the relationship between insurer loyalty and plan switching.

Implication

Cross-sectional study quantifies insurer retention in beneficiaries switching to Medicare Advantage plans, indicating stability in coverage.

Abstract

This cross-sectional study quantifies the extent to which Medicare beneficiaries who switched from stand-alone prescription drug plans to Medicare Advantage plans stayed with the same insurer.

Discussion

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Cite This Study

Hartman et al. (2026) studied this question.

synapsesocial.com/papers/6a48a83589561a0c2d78eea2 https://doi.org/10.1001/jamahealthforum.2026.1865

View Full Paper

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Insurer Retention of Stand-Alone Part D Plan Enrollees Switching to Medicare Advantage

Key Points

Implication

Abstract

Discussion

Cite This Study

Insurer Retention of Stand-Alone Part D Plan Enrollees Switching to Medicare Advantage

Key Points

Implication

Abstract

Discussion

Cite This Study

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