Skip to main page content
U.S. flag

An official website of the United States government

Dot gov

The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before sharing sensitive information, make sure you’re on a federal government site.

Https

The site is secure.
The https:// ensures that you are connecting to the official website and that any information you provide is encrypted and transmitted securely.

Access keys NCBI Homepage MyNCBI Homepage Main Content Main Navigation
. 2025 Jun 27;3(7):qxaf131.
doi: 10.1093/haschl/qxaf131. eCollection 2025 Jul.

The effect of providing Medicare Advantage enrollees diagnosed with cancer additional time to reassess enrollment

Affiliations

The effect of providing Medicare Advantage enrollees diagnosed with cancer additional time to reassess enrollment

Emma M Achola-Kothari et al. Health Aff Sch. .

Abstract

Introduction: Beneficiaries enrolled in Medicare Advantage (MA) and newly diagnosed with cancer may be incentivized to switch coverage, particularly if their MA plan restricts their access to cancer care. Beginning January 2019, the deadline to disenroll from an MA plan changed from February 14 to March 31 and, for the first time, beneficiaries could switch to a different MA plan as opposed to having to enter traditional Medicare.

Methods: We used 2016-2019 Surveillance, Epidemiology, and End Results (SEER) Medicare data to conduct a difference-in-differences analysis, estimating the effect of this new policy on rates of MA plan switching 1 month and 2 months after diagnosis.

Results: For beneficiaries diagnosed with cancer in March, the policy was associated with a modest increase in both overall rates of switching and in switching to a new MA plan 1 month after diagnosis. Results indicated that the policy had a modest positive effect on changes in Medicare coverage for enrollees diagnosed in January when outcomes were measured 2 months after diagnosis.

Conclusion: Relaxing enrollment rules for MA enrollees may not exacerbate adverse selection into traditional Medicare, given this evidence that beneficiaries with high-cost new diagnoses rarely exercised the option to change their MA plan.

Keywords: Medicare Advantage; cancer.

PubMed Disclaimer

Conflict of interest statement

Conflicts of interest: Please see ICMJE form(s) for author conflicts of interest. These have been provided as supplementary materials.

Figures

Figure 1.
Figure 1.
Unadjusted rates of any plan disenrollment by month of diagnosis, 2016–2019. Source: Authors' analysis of SEER-Medicare data, 2016–2019. Outcomes were measured on month post-diagnosis. Abbreviations: MA, Medicare Advantage; SEER, Surveillance, Epidemiology, and End Results; TM, traditional Medicare.

References

    1. Medicare Payment Advisory Commission . March 2024 Report to Congress: Medicare Payment Policy. Medicare Payment Advisory Commission; 2024:357–411. https://www.medpac.gov/wp-content/uploads/2024/03/Mar24_MedPAC_Report_To...
    1. Raoof M, Ituarte PHG, Haye S, et al. Medicare Advantage: a disadvantage for complex cancer surgery patients. J Clin Oncol. 2023;41(6):1239–1249. 10.1200/JCO.21.01359 - DOI - PubMed
    1. Kalidindi Y, Jung J, Feldman R, Carlin C, Song G, Mitchell A. Resource use and care quality differences among Medicare beneficiaries undergoing chemotherapy. JAMA Netw Open. 2024;7(9):e2434707. 10.1001/jamanetworkopen.2024.34707 - DOI - PMC - PubMed
    1. Office of Inspector General; Government Oversight; US Department of Health and Human Services . Some Medicare Advantage organization denials of prior authorization requests raise concerns about beneficiary access to medically necessary care. April 27, 2022. Accessed November 10, 2024. https://oig.hhs.gov/reports/all/2022/some-medicare-advantage-organizatio...
    1. Raoof M, Jacobson G, Fong Y. Medicare Advantage networks and access to high-volume cancer surgery hospitals. Ann Surg. 2021;274(4):e315–e319. 10.1097/SLA.0000000000005098 - DOI - PubMed

LinkOut - more resources