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Enrollment & timing

Employers Moved 1.2 Million Retirees Out of Medicare Advantage Drug Plans in 2026, First Decline Since 2010

Employer-sponsored Medicare Advantage drug plan enrollment fell by 1.2 million people in 2026, the first year-over-year drop since 2010, as employers shifted retirees into standalone drug plans at the fastest rate in more than a decade.

By the Goodsurance editorial teamSeptember 20, 2026

A KFF analysis of 2026 Part D enrollment found that group Medicare Advantage prescription drug plans lost 1.2 million members in 2026, the first year-over-year decline for that category since 2010. Over the same period, group standalone prescription drug plan enrollment rose by 1.2 million, the largest single-year gain for that category since 2013.

These shifts are driven by employers, unions, and retiree benefit plan sponsors, not by individual retirees. Large employers that cover retirees through Medicare group contracts decide which type of plan structure to use. When an employer switches its group contract from a Medicare Advantage drug plan to a standalone drug plan, all affected retirees move with it, regardless of personal preference.

In 2026, employers pulled 1.2 million retirees out of Medicare Advantage drug plans, a trend reversal not seen since 2010.

Individual-enrollment trends moved in a different direction. Non-group Medicare Advantage drug plan enrollment grew by 1.0 million and non-group standalone drug plan enrollment grew by 0.5 million in 2026. Total Part D enrollment reached 56.1 million as of early 2026, combining all plan types.

The employer-driven reversal coincides with a period of market instability in Medicare Advantage, including plan exits, benefit reductions, and rising out-of-pocket costs in many regions. Some large plan sponsors may be hedging by returning to standalone coverage, where drug plan performance is evaluated separately from medical coverage.

Retirees whose drug coverage comes through a former employer should check whether their plan type changed for 2026 or is scheduled to change for 2027, and review the new plan's formulary and cost-sharing ahead of open enrollment.

In plain words

KFF found that in 2026, employers moved 1.2 million retirees out of Medicare Advantage drug plans. This is the first time this has happened since 2010. Employers, not retirees, make this kind of decision. If your drug plan comes through a former job, your plan type may have changed without you choosing it. For 2027, check your drug plan's list of covered medicines and what you will pay before open enrollment opens October 15.

Understand the basics first

Source: KFF
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