Medicare Advantage gets a lot of attention, but Medicare Supplement is still a major part of the senior health insurance market.
According to new data from Mark Farrah Associates, Medicare Supplement enrollment reached over 13.8 million members in 2025, representing a 2% year-over-year increase. That may not sound dramatic, but in a competitive Medicare market, steady Med Supp growth is worth paying attention to.
For agents, the takeaway is simple: Medicare Supplement is not fading. It remains a strong, stable option for clients who want predictable coverage, provider flexibility, and help with Original Medicare out-of-pocket costs.
Approximate share of total Med Supp enrollment using Plan G, Plan F, and all other plans.
Plan G remained the most popular standardized Medicare Supplement plan in 2025. Enrollment grew from approximately 5.7 million members in 2024 to 6.3 million members in 2025.
That growth makes sense. For clients who became eligible for Medicare after January 1, 2020, Plan F is no longer available. As a result, Plan G has become the go-to comprehensive Med Supp option for many new Medicare beneficiaries.
For agents, this reinforces the importance of being able to clearly explain:
Even though Plan F is no longer available to newly eligible Medicare beneficiaries, it still represents a major block of business. MFA reported that approximately 4.2 million Med Supp members were enrolled in Plan F in 2025, accounting for more than one-third of the market.
That matters because many long-time Medicare clients may still be sitting on older Plan F policies. Some may be paying higher premiums than they need to, while others may be better off staying where they are depending on health status, underwriting, household discounts, and state-specific rules.
This creates an important review opportunity for agents.
A strong Med Supp review should not be about automatically moving someone. It should be about helping the client understand whether their current coverage still fits their needs and budget.
MFA also reported that Med Supp plans earned $40.4 billion in premiums and incurred $34.5 billion in claims during 2025. The aggregate loss ratio increased to 85.5%, up from 84.4% in 2024 and 83.9% in 2023.
In plain English, claims are rising faster than premiums.
For agents, this is something to watch closely. Higher claims pressure can contribute to future rate increases, especially in certain blocks, carriers, or states. It also makes annual policy reviews more important.
Clients may not always understand why their Med Supp premium changes. Agents who can explain market trends in simple language can build more trust and have better retention conversations.
The Medicare Supplement market is still highly concentrated. MFA reported that the top ten Med Supp companies held 71% of the market, covering more than 9.8 million members in 2025. UnitedHealth, through its AARP relationship, remained the market leader with 4.27 million members and about 31% market share.
For agents, carrier strength matters. But it should not be the only factor in a recommendation.
When reviewing Med Supp options, agents should continue comparing:
The lowest premium is not always the best long-term fit. A well-positioned recommendation should balance price, stability, and client needs.
The 2025 Med Supp data points to a market that is still healthy, competitive, and relevant.
For agents, this creates several opportunities:
1. Keep Med Supp in the conversation
Even if your agency writes a lot of Medicare Advantage, Med Supp should remain part of a complete Medicare planning discussion.
2. Review older Plan F clients
Some clients may benefit from reviewing alternatives, while others may be better off keeping their current coverage. Either way, the review adds value.
3. Strengthen Plan G conversations
Plan G continues to be the leading option for many new Medicare beneficiaries. Agents should be comfortable explaining it clearly and confidently.
4. Watch rate trends
Rising loss ratios may impact future pricing. Staying ahead of rate changes can help agents retain clients and identify review opportunities.
5. Position choice, not one-size-fits-all advice
Some clients value low premiums and extra benefits. Others value provider flexibility and predictable cost-sharing. The best agents help clients compare both paths clearly.
Medicare Supplement enrollment is still growing, and Plan G continues to gain ground.
For independent agents, this is a reminder that Med Supp is not just a legacy product. It is still an important solution for many Medicare clients, especially those who want the freedom to see providers that accept Medicare without network restrictions.
As the Medicare market continues to shift, agents who understand both Medicare Advantage and Medicare Supplement will be better positioned to guide clients, protect renewals, and grow a stronger book of business.
PSM Brokerage gives independent agents access to carrier options, training, quoting tools, and experienced support to help grow their Medicare business.