About 20,000 seniors in Massachusetts will need to seek new health insurance coverage after Blue Cross Blue Shield announced it will reduce its Medicare Advantage offerings starting in 2027. The state’s largest insurer cited significant financial losses as the primary reason for the decision.

Blue Cross Blue Shield reported that it incurred $275 million in losses related to its Medicare Advantage plans over the past two years, prompting the company to discontinue several of these plans. The changes include eliminating the plan currently held by Somerville resident Tom Stambaugh, 74, who says his costs will nearly triple in 2027. The insurer is also imposing strict limits on enrollment in its remaining Medicare Advantage options.

Medicare Advantage plans are privately operated alternatives to traditional Medicare, designed to provide coverage for individuals aged 65 and older through partnerships with the federal government. These plans have grown in popularity nationally, now covering over half of all Medicare beneficiaries.

Blue Cross is not the only provider scaling back its Medicare Advantage presence in Massachusetts. Other insurers, including Mass General Brigham Health Plan, Point32Health, and Mass Advantage, which serves Worcester County, have also reduced their plan offerings or exited the market entirely. This trend represents a notable shift in a sector that has experienced rapid growth in recent years.

For many seniors, these cutbacks could result in increased premiums and fewer available options as they approach their enrollment period for 2027 coverage. Industry observers and affected beneficiaries alike will be watching closely as insurers continue to respond to the financial challenges associated with Medicare Advantage plans.