The U.S. Treasury Department has rebuffed a request by House Ways and Means Chairman Rep. Paul Ryan, R- Wis., to explain $3 billion in payments that were made to health insurers even though Congress never authorized the spending through annual appropriations.

At issue are payments to insurers known as cost-sharing subsidies. These payments come about because President Obama’s healthcare law forces insurers to limit out-of-pocket costs for certain low income individuals by capping consumer expenses, such as deductibles and co-payments, in insurance policies. In exchange for capping these charges, insurers are supposed to receive compensation.

What’s tricky is that Congress never authorized any money to make such payments to insurers in its annual appropriations, but the Department of Health and Human Services, with the cooperation of the U.S. Treasury, made them anyway.

Health and Human Services spending on these cost-sharing payments is one of the issues named in House Speaker John Boehner’s lawsuit against the Obama administration's executive actions on Obamacare.

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