On January 28, 2011, CMS issued instructions on implementation of the ACA’s Laboratory Demonstration for Certain Complex Diagnostic Tests. The voluntary demonstration will establish a separate payment method for certain lab tests (analysis of gene protein expression, topographic genotyping, or a cancer chemotherapy sensitivity assay) that typically would be bundled into the payment for an associated hospital inpatient stay, when certain conditions are met. The demonstration period is between July 1, 2011 and June 30, 2013, or when a $100 million ceiling is reached.