Superintendent Alberto Carvalho of Miami-Dade County Public Schools says he knows how much gets paid out in health care claims, but the school system's insurance carrier, Cigna, won't disclose the charges. Lynne Sladky/AP hide caption

itoggle caption Lynne Sladky/AP

In 49 U.S. states, spotting the squished disc in this spinal MRI is still much easier than learning the price of the MRI in advance. AWelshLad/iStockphoto hide caption

itoggle caption AWelshLad/iStockphoto

The price for an X-ray is murkier than the image. Ivica Kljucar/iStockphoto.com hide caption

itoggle caption Ivica Kljucar/iStockphoto.com