Medicare is the largest public health insurance program in the United States, and it's shifting fast. More than 67 million Americans are currently enrolled, and for the first time in the program's history, the majority are on private Medicare Advantage plans instead of Original Medicare. New legislation in 2025 reshaped parts of the program yet again.
This piece pulls together the most important Medicare statistics for 2026, with every figure sourced from the Centers for Medicare & Medicaid Services (CMS), the Kaiser Family Foundation (KFF), or the Congressional Budget Office (CBO). Full source list at the bottom.
Enrollment: Who's on Medicare Today
Roughly one in five Americans is a Medicare beneficiary. The program covers people 65 and older, plus adults under 65 with certain disabilities or conditions like End-Stage Renal Disease (ESRD) and ALS. About 88% of beneficiaries qualify through age, and roughly 12% qualify through disability.
Medicare enrollment has been growing steadily for two decades as the Baby Boomer generation moves through the eligibility window. KFF projects enrollment will continue rising through 2030, when the youngest Boomers reach 65.
Medicare Advantage vs. Original Medicare
This is a major shift. In 2007, only about 19% of Medicare beneficiaries chose Medicare Advantage. As of 2024, that number crossed 54%, and it continues to grow. Medicare Advantage plans bundle Parts A, B, and usually D into a single private plan, often with extras like dental, vision, hearing, and gym benefits — many with $0 monthly premiums.
The tradeoff is network restrictions and prior authorization requirements. Original Medicare with a Medigap supplement gives broader provider access but typically higher monthly premiums.
Why This Matters
Because more than half of Medicare enrollees are now on Advantage plans, plan quality varies significantly. During Annual Enrollment (Oct 15 – Dec 7), reviewing your Advantage plan against the alternatives each year is one of the most valuable things you can do — plans change benefits annually.
Medicare Costs in 2026
Part A Premiums and Deductibles
Most people pay no Part A monthly premium because they or their spouse paid Medicare taxes for at least 10 years (40 quarters) during their working years. Part A covers inpatient hospital care, skilled nursing facility stays, hospice, and some home health services.
In 2026, the Part A inpatient hospital deductible is $1,676 per benefit period, per CMS.
Part B Premiums and Deductibles
Part B covers doctor visits, outpatient care, and preventive services. Most beneficiaries pay the standard premium above, but higher-income enrollees pay more through IRMAA (the Income-Related Monthly Adjustment Amount). The Part B annual deductible is $240 in 2026.
IRMAA Income Thresholds
IRMAA surcharges kick in when your Modified Adjusted Gross Income (MAGI) from two years prior exceeds certain thresholds. For 2026, based on 2024 income:
- Single filers: IRMAA begins above $106,000 in MAGI
- Joint filers: IRMAA begins above $212,000 in MAGI
Surcharges range from approximately $74 to $443 per month on top of the standard premium, depending on income tier. High earners can also pay a Part D IRMAA surcharge.
Prescription Drug Changes: Inflation Reduction Act Impact
The Inflation Reduction Act of 2022 (IRA) delivered the largest set of Medicare drug pricing changes in two decades. Several key provisions are now fully in effect for 2026:
Before 2025, there was no annual cap on Part D out-of-pocket costs — some beneficiaries paid thousands for specialty medications. As of 2025, that ceiling became $2,000 per year. Once you hit it, the plan covers 100% of covered drugs for the rest of the year.
Other IRA changes now in effect:
- $35 monthly insulin cap for all Medicare-covered insulin products
- Free adult vaccines under Part D (no cost-sharing for recommended vaccines)
- Medicare drug price negotiation: The first 10 negotiated drug prices took effect January 1, 2026. These include high-cost drugs like Eliquis, Jardiance, Xarelto, Januvia, and Imbruvica. A second list of 15 additional drugs is scheduled for 2027
- Payment smoothing: Enrollees can now spread their Part D out-of-pocket costs into monthly installments across the year, rather than paying large amounts in any single month
Who Benefits Most
The $2,000 cap and insulin limit disproportionately help seniors taking specialty medications for cancer, autoimmune conditions, and diabetes — historically the groups facing the steepest out-of-pocket costs.
What the One Big Beautiful Bill Changed
The One Big Beautiful Bill Act (OBBBA), signed into law in July 2025, included several provisions affecting Medicare and adjacent programs. Key Medicare-related items:
- Pharmacy Benefit Manager (PBM) reform: New transparency requirements for PBMs operating in Medicare Part D, aimed at making drug pricing mechanics clearer for plan sponsors and beneficiaries
- Medicare Advantage oversight: Additional CMS authority to scrutinize Medicare Advantage marketing and prior authorization practices
- Medicaid work requirements: While not Medicare-specific, these affect "dual-eligible" seniors who have both Medicare and Medicaid — a group of about 12.5 million beneficiaries
- Extended telehealth flexibilities: Medicare telehealth rules from the COVID era were made permanent for certain services
The law did not change the IRA's prescription drug provisions described above, so the $2,000 cap, insulin limits, and drug price negotiations remain in place.
Where the Money Goes: Medicare Spending
Medicare spending is now approaching a trillion dollars annually, up from about $830 billion in 2022. It represents roughly 14% of total federal spending, second only to Social Security among federal programs.
Where the dollars go, approximately:
- Medicare Advantage capitation payments to private plans: ~45%
- Fee-for-service hospital care (Part A): ~20%
- Fee-for-service physician and outpatient (Part B): ~20%
- Part D prescription drug subsidies: ~15%
Key 2026 Enrollment Dates
Missing these dates can cost you real money in late-enrollment penalties:
- Initial Enrollment Period (IEP): The 7-month window around your 65th birthday (3 months before, your birthday month, 3 months after)
- Annual Enrollment Period (AEP): October 15 – December 7 each year. This is when you can switch Medicare Advantage plans, change Part D, or move between Original Medicare and Medicare Advantage
- Medicare Advantage Open Enrollment Period: January 1 – March 31. If you're in an MA plan, you can switch to a different MA plan or drop back to Original Medicare
- General Enrollment Period (GEP): January 1 – March 31 for people who missed their IEP, with coverage starting the month after enrollment
- Special Enrollment Periods (SEP): Triggered by qualifying life events like loss of employer coverage or moving out of a plan's service area
The Bottom Line
Medicare in 2026 looks meaningfully different than even two years ago. The program covers more people, the private Medicare Advantage option is now the majority choice, prescription costs are capped for the first time, and new oversight rules are beginning to bite on plan marketing and PBM practices.
For anyone approaching 65 or already enrolled, the practical takeaway is that plan details change every year — and with the recent legislative shifts, reviewing coverage at each Annual Enrollment Period is more valuable than ever.
Sources & Further Reading
- Centers for Medicare & Medicaid Services, Medicare Enrollment Dashboard, cms.gov/data-research
- KFF, "Medicare Advantage in 2024: Enrollment Update and Key Trends," kff.org/medicare
- CMS, "2026 Medicare Parts A & B Premiums and Deductibles" (announcement), cms.gov/newsroom
- Medicare Trustees Report, 2024 Annual Report, cms.gov/oact/tr
- Inflation Reduction Act of 2022, Public Law 117-169, official text and CMS implementation guides
- CMS Drug Price Negotiation Program, medicare.gov/drug-negotiation
- Congressional Budget Office analyses of Medicare provisions in the One Big Beautiful Bill Act, cbo.gov
- Medicare.gov, official consumer Medicare resource, medicare.gov
Figures are current as of publication. Premium, deductible, and IRMAA thresholds change annually; always confirm current numbers at medicare.gov or with a licensed insurance agent before making decisions.