Skip to main content

Advanced Search

Advanced Search

Current Filters

Filter your query

Publication Types



Issue Briefs


On Medicare But At Risk: A State-Level Analysis of Beneficiaries Who Are Underinsured or Facing High Total Cost Burdens

seniors elderly patients doctors insurance

Medicare provides essential health coverage for older and disabled adults, yet it does not limit out-of-pocket costs for covered benefits and excludes dental, hearing, and longer-term care. The resulting out-of-pocket costs can add up to a substantial share of income. Based on U.S. Census surveys, nearly a quarter of Medicare beneficiaries (11.5 million) were underinsured in 2013–14, meaning they spent a high share of their income on health care. Adding premiums to medical care expenses, we find that 16 percent of beneficiaries (8 million) spent 20 percent or more of their income on insurance plus care. At the state level, the proportion of beneficiaries underinsured ranged from 16 percent to 32 percent, while the proportion with a high total cost burden ranged from 11 percent to 26 percent. Low-income beneficiaries were most at risk. The findings underscore the need to assess beneficiary impacts of any proposal to redesign Medicare.


Before Medicare was signed into law more than 50 years ago, nearly half of U.S. adults age 65 and older lacked health insurance, and many went without necessary care.1,2 Today, Medicare ensures that nearly all seniors have basic health coverage. In addition, Medicare insures 9 million disabled individuals under age 65. In surveys, the program’s beneficiaries report greater satisfaction with their coverage and more positive experiences accessing care than do those covered by private plans.3,4

Yet while Medicare continues to be a lifeline for seniors and people with disabilities, it fails to provide full protection from the high cost of getting sick. There is substantial cost-sharing, as well as no limit on out-of-pocket expenses for Medicare-covered benefits. Moreover, Medicare does not cover dental, hearing, vision, or long-term care. For beneficiaries with multiple illnesses or serious functional limitations, out-of-pocket costs can easily add up to thousands of dollars per year.

Beneficiaries also pay substantial premiums. Medicare’s monthly premiums for Part B physician and medical services, amount to $1,249 a year. And those lacking employer-provided retiree coverage to supplement their Medicare benefits may also pay premiums for drugs covered under Part D and for Medigap policies that cover Medicare cost-sharing expenses.5

The out-of-pocket costs of premiums plus medical care can consume a substantial share of income for Medicare’s aged and disabled beneficiaries, nearly half of whom live on less than $25,000 a year.6

To assess the extent of this financial burden at the national and state level, we compare beneficiaries’ out-of-pocket expenditures for health care services (including services not covered by Medicare) and total out-of-pocket expenses, including premiums, to beneficiaries’ annual incomes. We also examine how this burden varies for beneficiaries living below 200 percent of the federal poverty level compared to beneficiaries with higher income. We use two indicators of affordability to assess the cost burden faced by beneficiaries:

  • If beneficiaries are underinsured, meaning they spend 10 percent or more of their income on health care services, excluding premiums, or 5 percent or more of income if they are below 200 percent of poverty. This measure directly reflects health insurance design, including benefits not covered by Medicare or supplemental coverage.7
  • If beneficiaries have a high total cost burden, meaning they spend 20 percent or more of household income on premiums and medical care combined.

To obtain sufficient samples of Medicare beneficiaries at the state level, we merged results from the most recent two years of the U.S. Census Bureau’s Current Population Survey (CPS) to provide estimates of the two indicators for the combined years 2013 and 2014. For detailed methods, see About This Study.

The study results indicate that substantial shares of Medicare beneficiaries are at risk of high cost burdens in all states, especially beneficiaries who are poor or living on modest incomes. In total, 11.5 million Medicare beneficiaries (23%) were underinsured and 8 million (16%) spent 20 percent or more of their incomes on premiums plus medical care. Nationally and in all states, beneficiaries with low-incomes accounted for significant majorities of the millions with high cost burdens.

As baby boomers age into Medicare and enrollment grows, there may be proposals to reduce federal program costs by shifting more of the cost to beneficiaries. The evidence of already high financial burdens provided in this brief highlight the need for caution. Indeed, findings point to the need to instead consider reforms to redesign benefits and/or provide enhanced premium support to reduce financial burdens to ensure that beneficiaries are able to afford needed health care as well as other essential costs of living.


One in Four Medicare Beneficiaries Is Underinsured

Nationally, 11.5 million beneficiaries (23%) were underinsured in 2013–14, based on their medical out-of-pocket spending (excluding premiums) as a share of annual income (Exhibit 1). Beneficiaries with low incomes, below 200 percent of poverty, were at greatest financial risk of not being able to afford needed health care: they accounted for three-quarters of Medicare’s underinsured (Appendix Table 1). On average, 41 percent of low-income beneficiaries were underinsured—four times the share of higher-income beneficiaries who were underinsured (Exhibit 2).


The Census Bureau survey includes reported out-of-pocket costs for spending on deductibles and cost-sharing for services covered by Medicare, such as hospital and physician services, outpatient care, and prescription medicines, as well as services not covered by Medicare, including dental and long-term care. Thus, our underinsured measure reflects Medicare benefit cost-sharing as well as coverage gaps. Analysis of the Medicare Current Beneficiary Survey indicates that, on average, 27 percent of out-of-pocket spending by beneficiaries living in the community was for services not covered by Medicare (Exhibit 3). Including beneficiaries who have had extended stays in nursing homes, 43 percent of average out-of-pocket spending was for noncovered services.8

One in Six Medicare Beneficiaries Has High Total Cost Burdens

In 2013–14, an estimated 8 million Medicare beneficiaries (16%) lived in households that spent 20 percent or more of their annual income on the combination of health insurance premiums and medical care. Again, low-income beneficiaries are most at risk. Those with low income accounted for 73 percent of all beneficiaries with high total cost burdens (Appendix Table 2). As illustrated in Exhibit 2, more than one-fourth (27%) of low-income Medicare beneficiaries spent 20 percent or more of their incomes on premiums plus medical care, three times the proportion of those with higher income.

Our analysis indicates that the prevalence of high cost burdens relative to incomes within the Medicare population has changed little over the period 2011 to 2014 (Appendix Table 3). Although changes in CPS questions undermine time trends (see About This Study), both affordability indicators have been relatively stable over time. In large part, this reflects the income distribution of Medicare beneficiaries and the limited help available to those with incomes above the poverty level for paying premiums or health care costs. Forty percent of all beneficiaries have annual household incomes below 200 percent of poverty—less than $14,300 for a single person and $21,500 for a couple.

Although Medicaid supplements coverage for the poorest Medicare beneficiaries who meet asset tests, the majority who live below 200 percent of poverty do not qualify for this assistance. People on Medicare are not eligible for the Affordable Care Act’s premium or cost-sharing subsidies, and beneficiaries are not eligible for the law’s Medicaid expansion.9

In Most States, the Proportion of Medicare Beneficiaries Who Are Underinsured or Have High Total Costs Burdens Is Close to the National Average

Nationally, the share of Medicare beneficiaries who were underinsured for medical care ranged from 16 percent in Washington, D.C., to 32 percent in West Virginia (Exhibit 4). In all but nine states, however, the percentage of underinsured was not significantly lower or higher than the national average of 23 percent (Exhibit 4, Appendix Table 1).


In Louisiana, Mississippi, South Carolina, Tennessee, and West Virginia, the share of beneficiaries who were underinsured was highest, exceeding 28 percent (Exhibit 4). States with the highest proportions of underinsured beneficiaries tend to be those with higher proportions of low-income beneficiaries—a reflection of our lower underinsurance threshold for people below 200 percent of poverty.

Similarly, with the exception of eight states, the share of beneficiaries spending 20 percent or more of their income on the combination of premiums and medical care did not significantly diverge from the national average (Exhibit 5, Appendix Table 2). In the majority of states, at least 16 percent of beneficiaries faced total out-of-pocket costs that equaled or exceeded 20 percent of their annual income. The percentage of Medicare beneficiaries with high total burdens ranged from a low of 11 percent in Alabama to a high of 26 percent in North Dakota.


There were no apparent geographic patterns. All major regions of the country contained states with higher or lower shares of beneficiaries at risk for high cost burdens relative to income. The lack of clear patterns likely reflects the fact that Medicare is a national program whose benefits and subsidies are the same in all states.

Low-Income Medicare Beneficiaries Are More Likely to Be Unable to Afford to Get Sick

In all states, low-income beneficiaries were at greater risk than higher-income beneficiaries for being unable to afford needed care and for facing total cost burdens that consumed a high share of their income. Within states, the percentage of low-income beneficiaries who were underinsured or had high total cost burdens (spent 20% or more of their income) was often as much as six times greater than the percentage of their higher-income counterparts (Appendix Tables 1 and 2).

As illustrated in Exhibit 6, the proportion of low-income beneficiaries (below 200% of poverty) who were underinsured—spending 5 percent or more of their income on medical care, excluding premiums—was high in all states. Underinsured rates for those with low incomes ranged from about 30 percent in Florida and the District of Columbia to more than 50 percent in Indiana, South Carolina, and Montana, with the majority of states near the national average of 41 percent.



Our analysis reveals that in all regions of the country, significant shares of Medicare beneficiaries, despite being insured all year, are at risk for having high medical cost burdens and being unable to afford needed care. Including premiums, total out-of-pocket costs can represent a substantial portion of annual income, especially for beneficiaries living on low or modest incomes. Expenditures for medical services reflect Medicare’s relatively high cost-sharing, lack out-of-pocket caps for covered benefits, and absence of coverage for dental, hearing, and long-term services and supports.

Medical care spending and premiums can push low-income beneficiaries into poverty. Recognition that such health care expenditures can erode families’ ability to afford other essential living costs, such as housing and food, led the U.S. Census Bureau to add questions to its Current Population Survey (CPS) about out-of-pocket spending (thus enabling this study).

The Census Bureau now incorporates the CPS medical expenditure data with other adjustments to derive a supplemental poverty measure, which is published each year and compared with the official poverty measure (which does not take medical out-of-pocket spending into account). As Exhibit 7 illustrates, when the supplemental poverty measure is used, the percentage of adults age 65 or older who are poor is 50 percent higher than the official rate, an increase of 2 million people.10 And the percentage of seniors below 200 percent of poverty increases from 32 percent to 43 percent.


Our findings indicate that policymakers should not assume all Medicare beneficiaries are well protected or assured affordable access to care. The Affordable Care Act (ACA) provides substantial help to adults earning up to 200 percent of poverty, but these protections are not available to people on Medicare. As illustrated in Exhibit 8, ACA subsidies hold premium payments to no more than 2 percent of income for marketplace enrollees who are between 100 percent and 133 percent of poverty and no more than 3 percent for those between 133 percent and 150 percent of poverty ($240 to $480 in annual premium payments). With the addition of ACA cost-sharing subsidies, marketplace coverage has an effective actuarial value of 94 percent. Based on studies of plans offered in various states, this standard has resulted in average deductibles in the $200 range and out-of-pocket maximums for covered benefits under $900 a year.11

In contrast, the Medicare premium for Part B amounts to $1,462 a year for those newly eligible for Medicare, with no help for beneficiaries with incomes above 135 percent of poverty. Moreover, Medicare’s core hospital and physician benefits have no out-of-pocket maximum, and there is a high hospital deductible per episode of care and 20 percent cost-sharing for physician services, including those for hospitalized patients (Exhibit 8). As a result, when low-income adults become eligible for Medicare, they can experience sharp cost increases for premiums as well as basic hospital and medical care. These increases will have an especially pronounced impact on those who benefited from the Medicaid expansion or those who received substantial premium and cost-sharing subsidies with incomes near poverty.12

Exhibit 8. Comparison of Beneficiary Costs: Affordable Care Act Low-Income Provisions vs. Current Medicare Policy
 Illustrative income examples: beneficiary costs, single person
(poverty group)
(100% to <133%
($133% to <150%
(150% to <200%
ACA low-income provisions, 2016         
 If state with Medicaid expansion  Medicaid eligible      
        Annual premium  $240 $480  $720  $1,000
        Percent of income max  2%  3%  4%  5%
        Actuarial value  94%  94%  87%  87%
        Average deductible  $221  $221  $709  $709
        Average copayment, primary care visit  $12  $12  $16  $16
        Average copayment, specialist visit  $25  $25  $37  $37
        Average copayment per hospital stay  $291  $291  $414  $414
 Prescription drugs: included        
        Average out-of-pocket limit  $877  $877  $1,795  $1,795
 Current Medicare policy, 2016**        
 Part B premium: $121.80 month if new
to Medicare in 2016
 $0 if asset
test met
 $1,462  $1,462  $1,462
 Part B premium if on Medicare in 2015: 
 $0 if asset
test met
 $1,259  $1,259  $1,259
        Part B: doctors, outpatient, durable
        medical equipment
               Part B deductible  $166  $166  $166  $166
               Part B coinsurance  20%  20%  20%  20%
        Part A: Hospital, nursing home        
               Hospital: deductible per episode  $1,288  $1,288  $1,288  $1,288
               Skilled nursing facility after
              hospital: Up to 100 days-
              cost-sharing days 21 to 100
 $161  $161  $161  $161
 Out-of-pocket limit  None  None  None  None

*ACA estimates of average cost-sharing from M. Rae, G. Claxton, C. Cox et al. Cost-Sharing Subsidies in Federal Marketplace Plans, 2016 (Henry J. Kaiser Family Foundation, Nov. 13, 2015).

**Medicare 2016 Costs at a Glance (U.S. Department of Health and Human Services, Centers for Medicare and Medicaid Services).


Our findings on beneficiary out-of-pocket costs highlight the need for targeted reforms that would ease these burdens, especially in light of the increased need for medical care as the Medicare population ages. Aligning the ACA’s premium subsidies and cost-sharing reductions with Medicare policy would smooth people’s transition to Medicare. This harmonization also would make it easier to administer low-income subsidies across a person’s lifetime.13

The findings highlight the need for caution as baby boomers age into Medicare and the enrollment grows. When considering possible modifications to Medicare’s benefits or premiums, it will be important for policymakers to recognize that even small changes to cost-sharing or premiums make a difference. Given beneficiaries’ already high cost burdens and Medicare’s central purpose to ensure access to care, there will be a need for alternatives to simply shifting more costs onto beneficiaries. Creative policies could be crafted to ensure the affordability of care and to meet the needs of the nation’s population into the future, by building on Medicare’s strengths while addressing gaps that put beneficiaries at high financial risk.


Starting in March 2010, the U.S. Census Bureau’s Current Population Survey (CPS) included questions about out-of-pocket spending on medical care and health insurance premiums. These questions were added to enable creation of a supplemental poverty measure that accounts for essential medical care spending not included in the official poverty measure. The March CPS also includes annual questions on insurance coverage and household income. Our analysis uses the most recent annual data available—for 2013 and 2014 (from the March 2014 and March 2015 CPS) to produce national and state estimates of the number and share of Medicare beneficiaries at risk for incurring health care expenditures that are high compared with their incomes.

We used two indicators of financial risk for Medicare beneficiaries: high total cost burden and high medical care expenditures relative to income (underinsured). We define high total cost burden as spending 20 percent or more of annual income on medical care and premiums. This measure underreports total premiums, because CPS respondents are not asked to report their Medicare Part B premiums—likely because not many beneficiaries would know their premium amounts, since these are subtracted from Social Security payments.

To estimate the number of underinsured beneficiaries, we excluded premiums and divided out-of-pocket spending on medical care services by household income. We used thresholds developed for earlier studies of the under-65 population,14 categorizing Medicare beneficiaries as underinsured if they were in households that spent 10 percent or more of income on medical care alone, or 5 percent or more if income was less than 200 percent of the federal poverty level. This lower threshold, which reflects low-income beneficiaries’ limited ability to pay for care, follows the maximum threshold established for the original Children’s Health Insurance Program for children in families with incomes below 200 percent of poverty.

We provide national and state estimates of the share of Medicare beneficiaries at risk of high total cost burden or being underinsured and show how these vary by whether income is below 200 percent of poverty (less than $14,300 for single adults and less than $21,500 for couples) or 200 percent or higher. To produce sufficient samples for state-level estimates, we combined the most recent two years of the CPS (March 2014 and 2015), asking about 2013 and 2014. The Census Bureau redesigned income questions to more adequately capture potential income sources. The March 2014 survey asked roughly 40 percent of the sample the redesigned questions. In March 2015, the redesigned income questions were standard. As instructed by the Census Bureau, we used a partial sample for CPS 2014 of beneficiaries who were asked the redesigned income questions to merge the two years. The resulting unweighted sample includes 35,898 Medicare beneficiaries, with at least 200 records per state. In instances where the unweighted sample was too small—less than 200 for an income group—we suppressed the results for that income group in the exhibits included in this issue brief. (The state unweighted samples are available from the authors.) We include one table depicting time trends (see Appendix Table 3). But note that the redesigned income questions resulted in higher reported income and thus disrupt trends for the indicators.15

The exhibits provide population estimates using population weights provided by the U.S. Census Bureau. The CPS is designed to be representative of the community-dwelling population, excluding those living in long-term nursing homes or other institutions. In the merged two years, the weighted sample represents 50 million Medicare beneficiaries, including disabled beneficiaries under age 65.

For state-level analyses, we compared state rates to the national average excluding that state. This was a means to judge whether a state’s outcome (rate paying above given medical spending thresholds) was statistically significantly different from that of other states at p <.05 percent. We use the STATA “svyset” test procedure on the replicate weight estimates released by the Annual Social and Economic Supplement (ASEC) to calculate variances. This provides population weighting and adjustments to standard errors that account for ASEC sampling design.


1 J. Cubanski, C. Swoope, C. Boccuti et al., A Primer on Medicare: Key Facts About the Medicare Program and the People It Covers (Henry J. Kaiser Family Foundation, March 20, 2015).

2 J. Lubitz, L. G. Greenberg, Y. Gorina et al., “Three Decades of Health Care Use by the Elderly, 1965–1998,” Health Affairs, March–April 2001 20(2):19–32.

3 Harris Interactive, “Medicare, Crime-Fighting, Social Security, Defense—The Most Popular Federal Government Services,” News Release (Harris Interactive, Jan. 14, 2010.

4 K. Davis, K. Stremikis, M. M. Doty, and M. A. Zezza, “Medicare Beneficiaries Less Likely to Experience Cost- and Access-Related Problems Than Adults with Private Coverage,” Health Affairs, published online July 18, 2012.

5 C. Schoen, C. Buttorff, M. Andersen et al., “Policy Options to Expand Medicare’s Low-Income Provisions to Improve Access and Affordability,” Health Affairs, Dec. 2015 34(12):2086–94.

6 Authors’ tabular data from CPS table creator using household income and family size for Medicare beneficiaries, March 2015 for year 2014,

7 Note that the underinsured measure used in this study differs from the one used in previous Commonwealth Fund research. We did not have information on deductibles and thus could not assess potential risk—deductibles equaling or exceeding 5 percent of income. The CPS measure assesses incurred expenses only.

8 The Medicare Current Beneficiary Survey is a continuous longitudinal survey of approximately 15,000 Medicare beneficiaries. The data are from 2010. For further details see Table 3 technical appendix of C. Schoen, C. Buttorff, M. Andersen et al., “Policy Options to Expand Medicare’s Low-Income Provisions to Improve Access and Affordability,” Health Affairs, Dec. 2015 34(12):2086–94.

9 C. Schoen, C. Buttorff, M. Andersen et al., “Policy Options to Expand Medicare’s Low-Income Provisions to Improve Access and Affordability,” Health Affairs, Dec. 2015 34(12):2086–94.

10 K. Short, The Supplemental Poverty Measure: 2014, Current Population Reports, P60-254 (U.S. Census Bureau, Sept. 2015).

11 ACA data for average cost-sharing in federal marketplaces from M. Rae, G. Claxton, C. Cox et al., Cost-Sharing Subsidies in Federal Marketplace Plans, 2016 (Henry J. Kaiser Family Foundation, Nov.13, 2015).

12 For ACA provisions for premium and cost-sharing subsidies for the under-65, non-Medicare population, see S. R. Collins, M. Gunja, and S. Beutel, How Will the Affordable Care Act’s Cost-Sharing Reductions Affect Consumers’ Out-of-Pocket Costs in 2016? (The Commonwealth Fund, March 2016); or C. Schoen, S. Hayes, and P. Riley, The Affordable Care Act’s New Tools and Resources to Improve Health and Care for Low-Income Families Across the Country (The Commonwealth Fund, Oct. 2013).

13 C. Schoen, C. Buttorff, M. Andersen et al., “Policy Options to Expand Medicare’s Low-Income Provisions to Improve Access and Affordability,” Health Affairs, Dec. 2015 34(12):2086–94.

14 C. Schoen, M. M. Doty, R. H. Robertson, and S. R. Collins, “Affordable Care Act Reforms Could Reduce the Number Underinsured U.S. Adults by 70 Percent,” Health Affairs, Sept. 2011 30(9):1762–71. For an under-65 state study, see C. Schoen, S. L. Hayes, S. R. Collins, J. A. Lippa, and D. C. Radley, America’s Underinsured: A State-by-State Look at Health Insurance Affordability Prior to the New Coverage Expansions (The Commonwealth Fund, March 2014).

15 J. L. Semega and E. Welniak, “The Effects of Changes to the Current Population Survey, Annual Social and Economic Supplement on Estimates of Income,” Proceedings of the 2015 Allied Social Science Association (ASSA) Research Conference (U.S. Census Bureau, Sept. 2015).

Publication Details



Cathy Schoen, Senior Scholar in Residence, New York Academy of Medicine

[email protected]


C. Schoen, C. Solís-Román, N. Huober et al., On Medicare But At Risk: A State-Level Analysis of Beneficiaries Who Are Underinsured or Facing High Total Cost Burdens, The Commonwealth Fund, May 2016.