CMS has published a notice inviting interested parties to participate in the ACA-mandated “Treatment of Certain Complex Diagnostic Laboratory Tests Demonstration.” The Demonstration allows a separate payment to laboratories performing certain complex laboratory tests that would, under standard Medicare rules, be bundled into the payment to the hospital or critical access hospital. CMS has posted a list of the lab tests subject to the demonstration and other background information on its web site. Potential participants must apply for a temporary billing code by August 1, 2011. Payment under the demonstration begins January 1, 2012, and the demonstration will last two years or until a $100 million ceiling is reached. CMS has scheduled an educational call to discuss the program on July 21.