Medicare Part D Enrollment Shifts: A Growing Trend Towards Medicare Advantage and Employer-Sponsored Plans
As of February 2026, 56.1 million Medicare beneficiaries are enrolled in Part D prescription drug plans, marking a significant milestone in the program’s evolution. Recent data reveals a notable shift in enrollment patterns, with a growing preference for Medicare Advantage plans (MA-PDs) and employer-sponsored group plans.
The Rise of Medicare Advantage Plans (MA-PDs)
More than half of all Part D enrollees – 56%, or 31.3 million people – are now choosing MA-PDs, which combine medical and prescription drug coverage. This reflects the broader trend of increasing enrollment in Medicare Advantage overall. While MA-PD enrollment saw a slight dip between February 2025 and February 2026, it remains the dominant choice for many beneficiaries.
Pro Tip: If you’re latest to Medicare, carefully compare MA-PDs and stand-alone Prescription Drug Plans (PDPs) to determine which best suits your healthcare needs and budget.
Stand-Alone PDPs: A Modest Increase
Stand-alone PDP enrollment stands at 24.9 million, representing 44% of all Part D enrollees. This is a slight increase from previous years, with overall PDP enrollment growing by 1.7 million between 2025 and 2026. Though, the number of available PDP options continues to decrease, dropping from 14 to 11 for the average beneficiary.
The Unexpected Surge in Employer-Sponsored Plans
A surprising development is the significant increase in enrollment in employer-sponsored group PDPs. Enrollment in these plans jumped by 1.2 million, reaching 6.3 million – the largest increase since 2013. Simultaneously, enrollment in employer-sponsored group MA-PDs decreased by 1.2 million, falling to 2.7 million. This marks the first year-over-year decline in group MA-PD enrollment since 2010.
This shift appears to be driven by a strategic move by employers and unions to separate medical and prescription drug benefits. By contracting separately for MA-only plans and stand-alone PDPs, groups can take advantage of the Part D premium stabilization demonstration and receive additional federal subsidies.
Premium Trends: Lower Costs with PDPs
The average monthly enrollment-weighted premium for non-group PDPs fell from $39 to $36 between February 2025 and February 2026. This is likely due to the availability of lower-premium PDPs, prompting beneficiaries to switch plans. Several national PDPs are now offering premiums below $10 in many regions.
Did you know? Some PDPs are offering premiums well below $10 in many regions, providing affordable options for those in traditional Medicare.
Key Players: Humana and Centene Lead PDP Growth
Humana and Centene experienced the largest increases in PDP enrollment between 2025 and 2026. Humana’s PDP enrollment surged by 61%, while Centene’s increased by 11%. Both companies achieved this growth by reducing monthly premiums and offering low or zero-premium PDP options in several regions.
Conversely, CVS Health and Health Care Service Corporation saw declines in PDP enrollment, while UnitedHealth Group experienced only a modest increase. These companies generally have higher average premiums across their PDP offerings.
Looking Ahead: Potential Future Trends
Several factors suggest these trends will continue in the coming years.
- Continued Growth of Medicare Advantage: The increasing popularity of MA plans is likely to persist, driven by factors such as convenience, additional benefits, and competitive premiums.
- Employer-Sponsored Plans as a Growing Segment: The trend of employers and unions shifting to separate MA-only and PDP contracts is expected to continue, fueled by the availability of premium subsidies.
- Premium Competition: The competition among PDPs will likely intensify, leading to further premium reductions and a wider range of plan options.
- Consolidation in the Market: The Medicare Part D landscape may see further consolidation as insurance companies seek to gain scale and efficiency.
FAQ
Q: What is Medicare Part D?
A: Medicare Part D helps cover the cost of prescription drugs. It’s offered through private insurance companies approved by Medicare.
Q: What’s the difference between an MA-PD and a PDP?
A: An MA-PD combines medical and drug coverage, while a PDP covers only prescription drugs and is used with Original Medicare.
Q: Can I switch Medicare plans during the year?
A: Generally, you can only switch plans during the Annual Enrollment Period (October 15 – December 7). There are some exceptions, such as if you qualify for a Special Enrollment Period.
Q: Where can I find more information about Medicare Part D?
A: Visit the official Medicare website at https://www.medicare.gov/health-drug-plans/part-d.
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