Between 2000 and 2014, out-of-pocket (OOP) health costs decreased or remained unchanged for most age groups and insurance coverage categories in the U.S. civilian non-institutionalized population. The percentage of the population with OOP payments for medical care decreased between 2000 and 2014 for elderly and non-elderly age groups, and for those with private or public insurance, and for the uninsured. The most substantial decrease in average annual OOP was among older adults covered by both Medicare and Medicaid; their OOP payments decreased by 69.5%, from $1,253 in 2000 to $427 in 2014. However . . .