Time to revisit out-of-pocket expenses calculations? Consumers burn through their share in a matter of days.

For many, meeting their out-of-pocket limit for the year comes after just one health care visit.

Nearly 40% of commercially insured people incurred half of their annual out-of-pocket spending in just one encounter, and 26% incurred 90% in only one or two encounters. (Photo: Shutterstock)

Out-of-pocket health-care expenditures traditionally have been calculated on an annual basis. However, expenses often occur in much shorter periods.

“We found that although most commercially insured people had several health-care encounters throughout the year, their out-of-pocket spending was mostly concentrated within short time intervals,” according to research reported in the February issue of Health Affairs. “Nearly one-third of people with above-the-median total annual health-care spending (plan plus out-of-pocket spending) incurred half of their annual out-of-pocket spending in just one day.

Related: Who shoulders the greatest burden of out-of-pocket health care costs?

“Policymakers working to improve the affordability of care should focus on innovative approaches to cost-sharing that prevent dramatic financial shocks to household budgets due to medical bills.”

Annual metrics ignore important variations in the distribution of spending throughout the year, the report said, which could result in affordability challenges for the large number of Americans who lack savings to cover large and unexpected expenses. Despite the well-documented financial challenges that many households face in terms of rising debt and stagnant wages, temporal clustering of out-of-pocket spending remains an understudied aspect of health-care affordability.

Researchers uncovered several statistics that could shape changes to the current system:

“Many people with employer-sponsored insurance incur substantial out-of-pocket spending within a short time span, leading to potential challenges to affording health care,” researchers concluded. “Policymakers working to improve the affordability of care should focus not only on curbing the growth of health-care prices but also on innovative approaches to cost-sharing that prevent dramatic financial shocks to household budgets as a result of medical bills.

“For example, instituting monthly rather than the current annual out-of-pocket spending limits could improve access to care and financial security while encouraging judicious use of health-care services by patients.”

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