Republicans argue that health insurance premiums will spike as a result of the Affordable Care Act. Democrats say the law will slow premium growth and ensure more care for every dollar.
Walden's bill would add several lines to insurers' annual benefit summaries.
Each plan would have to report the amount paid under each of the Affordable Care Act's taxes, including its exchange fees and risk-adjustment charges.
The bill would also require the U.S. Comptroller General to study the law's impact on premiums, specifically its non-discrimination provisions and its essential benefits mandate.