Current Medicare Enrollment Numbers

As of 2024, approximately 67 million people are enrolled in Medicare. This number includes people aged 65 and older, younger people with disabilities, and people with end-stage renal disease or ALS. The enrollment figure grows each year as the population ages and more people reach 65.

The exact count changes month to month because people turn 65 continuously, some people move between Medicare plans, and enrollment in certain programs fluctuates with the seasons. The Centers for Medicare & Medicaid Services (CMS) publishes updated figures regularly, but the 67 million figure represents the most recent snapshot available to the public.

Key Takeaways

  • Medicare covers roughly 67 million people as of 2024, a number that rises each year as Americans age.
  • Enrollment includes not only people 65 and older but also younger people with disabilities and people with specific conditions like end-stage renal disease.
  • The enrollment total varies slightly month to month because people turn 65 continuously and move between different Medicare plans.
  • CMS publishes detailed breakdowns by state, age group, and plan type if you want to see how enrollment is distributed.

How Enrollment Breaks Down by Medicare Part

Medicare enrollment divides into different parts, and not everyone is enrolled in all of them. Part A (hospital insurance) covers nearly all 67 million enrollees because it is automatic for people 65 and older. Part B (medical insurance) covers a smaller number because people must choose to enroll and pay a monthly premium.

Part D (prescription drug coverage) and Part C (Medicare Advantage) have their own enrollment numbers that sit below the total. Many people hold Part A and Part B but skip Part D if they have drug coverage elsewhere, or they choose Part C instead of traditional Medicare. This means the sum of individual parts exceeds the total enrollment figure because people hold multiple parts at once.

Why the Numbers Keep Growing

Medicare enrollment has grown steadily for decades and will continue to grow. The primary reason is demographic: the Baby Boomer generation (people born between 1946 and 1964) has been reaching age 65 since 2011. This wave of new enrollees will continue through the early 2030s, adding roughly 10,000 people per day to Medicare in some years.

A secondary reason is that people are living longer. Someone who enrolled at 65 in 1990 might still be enrolled today at 99. The combination of new enrollees and longer lifespans means the total enrollment number will likely reach 80 million or more by 2030, according to CMS projections.

Enrollment by State and Region

Medicare enrollment is not evenly distributed across the country. States with older populations, such as Florida and Maine, have higher enrollment rates relative to their total population. States with younger populations have lower Medicare enrollment even if their total population is large.

CMS publishes a state-by-state breakdown each year showing how many people are enrolled in each state and which plans are most common in each region. This information is useful if you are trying to understand how many people in your area use Medicare or if you want to see how your state compares to others.

Who Counts Toward the Enrollment Total

The 67 million figure includes people aged 65 and older who have enrolled in Medicare. It also includes people under 65 who have been on Social Security Disability Insurance (SSDI) for at least two years, because they become may be able to access for Medicare automatically. People with end-stage renal disease and people with ALS are also counted, regardless of age.

The total does not include people who are may be able to access for Medicare but have not yet enrolled, or people who have delayed enrollment. It counts only people with active Medicare coverage at the time the data is collected.

How CMS Tracks and Reports These Numbers

The Centers for Medicare & Medicaid Services publishes enrollment data through its monthly and annual reports. The most detailed information appears in the "Medicare Enrollment" reports, which break down enrollment by age, state, plan type, and other categories. These reports are free and available on the CMS website.

CMS also publishes "Beneficiary Profile" data, which shows characteristics of the people enrolled — their age, gender, whether they have both Part A and Part B, and which plans they hold. This information helps researchers, policymakers, and the public understand who Medicare serves and how the program is used.

Frequently Asked Questions

Does the 67 million number include people who have Medicare but also have other insurance?

Yes. The enrollment count includes everyone with active Medicare coverage, whether or not they also hold private insurance, Medicaid, or coverage through a current or former employer. Many Medicare enrollees have multiple forms of coverage at the same time.

How often does CMS update the enrollment numbers?

CMS publishes updated enrollment figures monthly and releases detailed annual reports. The monthly updates are usually available within a few weeks of the end of each month. The most comprehensive data appears in the annual report, typically released in the fall.

Will Medicare enrollment keep growing at the same rate?

Growth will slow after the early 2030s, when the Baby Boomer generation has mostly reached age 65. After that, enrollment growth will depend mainly on how long people live and whether may be able to access rules change. Current projections suggest enrollment will level off in the 2040s.

Can I find enrollment numbers for a specific Medicare plan or insurance company?

Yes. Insurance companies that offer Medicare plans must report their enrollment to CMS, and this data is public. You can find plan-specific enrollment numbers in the CMS reports or by contacting the insurance company directly.