Orlando Harmon
Medicare is the primary form of health insurance for older adults in the US. It is provided by the federal government and covers the healthcare costs of people aged 65 or older, as well as those with certain disabilities or illnesses. Medicare is split into different parts, with Part A covering inpatient hospital stays, Part B covering certain doctors' services and outpatient care, and Part D covering prescription drugs and most recommended vaccines. As of 2023, over 65 million people were enrolled in Medicare, with nearly two-thirds of enrollees having individual plans. Medicare cost the US $917 billion in 2020 and this figure is expected to rise to up to $1.78 trillion by 2031.
| Characteristics | Values |
|---|---|
| Number of people enrolled in Medicare | 65 million (2022), 65,748,297 (March 2023), 67.3 million (April 2024), 68 million (September 2024) |
| Number of people enrolled in Original Medicare | 33,948,778 (March 2023), 49.5% (September 2024), 49.6% (April 2024), 31.4 million (2022) |
| Number of people enrolled in Medicare Advantage or other health plans | 31,799,519 (March 2023), 50.5% (September 2024), 50.4% (April 2024), 33.6 million (2022) |
| Number of people enrolled in Medicare Part D | 51,591,776 (March 2023), 80.4% (September 2024) |
| Number of people enrolled in Medicare Advantage SNP | 6.64 million (2025), 6.6 million (enrolled in SNP) |
| Medicare Part A cost per month | $505 (2024), $518 (2025) |
| Medicare Part B cost per month | $174.70 (2024), $185 (2025) |
| Medicare Part C cost per month | $18.23 (2024), $17 (2025) |
| Medicare Part D cost per month | $34.70 (2024), $36.78 (2025) |
| Number of non-institutional providers | 1.84 million (2022) |
| Number of non-physician practitioners | 580,000+ (2022) |
| Number of primary care physicians | 221,000+ (2022) |
| Percentage of people enrolled by state | Maine and West Virginia (24%+), California (6.5 million) |
| Medicare's income in 2022 | $988 billion |
| Total Medicare spending in 2022 | $905 billion |
| Medicare's cost in 2020 | $917 billion |
| Projected Medicare cost in 2031 | $1.78 trillion |
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What You'll Learn
Medicare enrolment statistics
Medicare is the primary form of health insurance for older adults in the US. It is provided by the federal government and helps cover the health care costs of people aged 65 or older, as well as those with certain disabilities or illnesses.
As of March 2023, 65,748,297 people were enrolled in Medicare. Of these, 33,948,778 were enrolled in Original Medicare, and 31,799,519 were enrolled in Medicare Advantage or other health plans. By April 2024, this number had risen to approximately 67.3 million US adults enrolled in Medicare coverage. This increase is likely due to population growth and an ageing demographic.
Medicare is split into parts, with Part A (Hospital Insurance) covering inpatient hospital stays, care in skilled nursing facilities, hospice care, and parts of home health care. In 2024, enrollees who paid for Part A paid up to $505 per month, which increased to $518 per month in 2025. Medicare Part B (Medical Insurance) covers certain doctors' services, outpatient care, medical supplies, and preventive care. In 2024, Part B cost $174.70 per month, increasing to $185 per month in 2025. Depending on income, the Part B premium may be higher. Medicare Part C refers to Medicare Advantage plans, which are provided by private companies and typically include Parts A, B, and D, with some additional benefits. The average monthly premium for Medicare Part C was $18.23 in 2024 and $17 in 2025. Medicare Part D is prescription drug coverage, and in 2024, the national base premium was $34.70 per month, increasing to $36.78 in 2025.
In 2022, 65 million people were enrolled in the Medicare program, which was 18.7% of the total US population. Of these, 54 million were beneficiaries due to age, and the rest due to disabilities. California had the highest number of Medicare beneficiaries, with nearly 6.5 million. Maine and West Virginia had the highest percentage of beneficiaries, with over 24% of their populations enrolled.
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Medicare costs and spending
Medicare is the primary form of health insurance for older adults in the US. It is provided by the federal government and helps cover the healthcare costs of people aged 65 and above, as well as those with certain disabilities or illnesses. Medicare cost the US $917 billion in 2020, and this figure is projected to almost double by 2031, reaching up to $1.78 trillion. Medicare spending grew by 8.1% to $1,029.8 billion in 2023, accounting for 21% of total national health spending.
Medicare spending is projected to grow as a share of both the federal budget and the nation's economy. This growth is attributed to several factors, including the ageing population, increased use of services, more intensive care, and rising healthcare costs. Additionally, higher enrollment in Medicare Advantage plans and the higher payments associated with these plans have contributed to the overall increase in Medicare spending. Medicare Advantage enrollment is expected to increase to 61% of eligible beneficiaries by 2031, up from 48% in 2022.
Medicare Part A is free for most people receiving Social Security. However, enrollees who paid for Part A in 2024 incurred monthly costs of up to $505, which increased to $518 per month in 2025. Medicare Part B, which covers doctor's visits and outpatient care, had a monthly cost of $185 in 2025, up from $174.70 in 2024. Medicare Part C premiums vary by plan, with an average monthly premium of $17 to $18.23. Part D, which covers prescription drugs, has a national base premium of $36.78 per month in 2025, up from $34.70 in 2024. It is worth noting that these premiums do not include copays, coinsurance, or deductibles.
Medicare spending varies across states, with per-beneficiary expenditures highest in Florida at $13,652 and lowest in Vermont at $8,726 in 2020. In 2020, per-person spending for females was 14% higher than for males, and older adults had slightly higher spending for males than females. Medicare expenditures also vary depending on the specific health condition being treated. For example, in 2016, Harvoni, a treatment for Hepatitis C, accounted for $4.4 billion in spending.
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Medicare income
Medicare is the primary form of health insurance for older adults in the US. It is provided by the federal government and covers the healthcare costs of people aged 65 and above, as well as those with certain disabilities or illnesses. As of 2023, over 65 million people were enrolled in Medicare, with approximately 50% enrolled in a Medicare Advantage plan and the remaining enrolled in Original Medicare.
Medicare has four parts: Part A, Part B, Part C, and Part D, each covering different aspects of healthcare. Part A is typically free for individuals receiving Social Security, but enrollees who are not eligible for this can pay up to $518 per month as of 2025. Part B, which covers doctor's visits and outpatient care, costs $185 per month in 2025. The premiums for Parts A and B can be adjusted based on an individual's income level, with higher-income beneficiaries paying an additional amount called the "income-related monthly adjustment amount." This adjustment is applied to Part B and prescription drug coverage premiums.
Part C, also known as Medicare Advantage, offers an alternative to traditional fee-for-service Medicare, with varying premiums depending on the plan. Part D covers prescription drugs and has a national base premium of $36.78 per month in 2025, excluding copays, coinsurance, or deductibles. Lower-income consumers may qualify for cost-saving programs or subsidies to reduce their financial burden.
In addition to enrollee premiums, the government contributes significantly to Medicare's income. For Part B, the government typically pays about 75% of the premium, with the beneficiary covering the remaining 25%. However, this ratio can vary for higher-income individuals, with their income reported to the IRS used to determine the specific percentage they pay.
Medicare's income is closely tied to its complex structure of enrollee premiums and government contributions. The program's costs and sustainability have been the subject of ongoing discussions, with potential reforms being considered to address these concerns.
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Medicare reform
Medicare is the primary form of health insurance for older adults in the US. It is provided by the federal government and covers the healthcare costs of people aged 65 or older, as well as those with certain disabilities or illnesses. As of 2023, over 65 million people were enrolled in Medicare, with nearly two-thirds of beneficiaries choosing individual plans.
Maintaining Core Values
Any reform should honour and maintain Medicare's core values to ensure its continued success. Medicare should remain a national health insurance program, providing a unified community of interests among people of different health and financial backgrounds. It should not separate beneficiaries into distinct groups based on their ability to pay or their health status. Equal access to quality healthcare services should be provided for all beneficiaries, regardless of their specific circumstances.
Expanding Coverage
There has been a push for expanding Medicare to include dental, hearing, and vision benefits. While this proposal has broad support among Americans, it has faced opposition due to concerns about the program's solvency. However, reforms that expand access and affordability are crucial, as many individuals still face financial challenges in obtaining necessary treatment.
Physician Payment Reform
The current Medicare physician payment system has been criticised as inadequate and unsustainable. Physician payments have lagged, resulting in financial strain and even closures of medical practices. Congress is urged to move beyond temporary fixes and work towards long-term reform that ties physician payment to the Medicare Economic Index (MEI) to stabilise practices and protect patient access to care.
Part D Reforms
Six key reforms to Medicare Part D, which covers prescription drugs, were passed in 2022 as part of the Inflation Reduction Act. These reforms, which took effect between 2023 and 2025, aim to improve access to prescription medications and address the issue of rising healthcare costs.
Simplifying Enrollment
Medicare has four distinct parts, and enrollment can be confusing for beneficiaries. Reforms should aim to simplify the enrollment process and provide clear guidance to help individuals navigate the different parts of Medicare and make informed choices during open enrollment.
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Medicare providers
Medicare is the primary form of health insurance for older adults in the US. It is provided by the federal government and helps cover the healthcare costs of people aged 65 or older, as well as those with certain disabilities or illnesses. Medicare is made up of four parts, and as of March 2023, a total of 65,748,297 people were enrolled in the program. This number increased to 67.3 million by April 2024 and 68 million by September 2024.
As of 2022, over 1.84 million non-institutional providers (individual physicians) participated in Medicare. Non-physician practitioners, such as registered nurses and physician assistants, make up the majority of providers (over 580,000). Primary care physicians are the second most common type of Medicare provider, with over 221,000 in 2022. Physicians can choose whether or not to participate in Medicare, but the program can be a significant source of revenue for those who do.
Medicare beneficiaries can choose to receive their benefits through private Medicare Advantage plans (Part C) or traditional fee-for-service Medicare. In 2023, 33,948,778 people were enrolled in Original Medicare, and 31,799,519 were enrolled in Medicare Advantage or other health plans. By 2024, enrollment in Original Medicare had decreased to 49.5% or 33.6 million people, while 50.5% or 33.7 million were enrolled in Medicare Advantage or other health plans. Medicare Advantage plans include Medicare Advantage Prescription Drug plans (MA-PD), which are the only option for drug coverage in the Medicare program.
Medicare Part A is free for most people receiving Social Security, while Part B and Part C require monthly premiums. Medicare Part D covers prescription drugs and most recommended vaccines, and it also requires a monthly premium.
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Frequently asked questions
As of 2023, there are over 65 million people enrolled in Medicare in the US, which equates to 18.7% of the population.
As of March 2023, 33,948,778 people were enrolled in Original Medicare. This number had increased to 49.5% of all Medicare members as of September 2024.
As of March 2023, 31,799,519 people were enrolled in Medicare Advantage. This number had increased to 50.5% of all Medicare members as of September 2024.
