This document is about the written testimony provided by John D. Freedman, MD, MBA, president and CEO of Freedman Healthcare, to the State All Payer Claims Databases Advisory Committee. The testimony discusses the importance of All-Payer Claims Databases (APCDs) in supporting healthcare price transparency, identifying waste and unnecessary procedures, tracking public health issues, evaluating provider quality, and measuring provider market power. The testimony urges the committee to create a standard APCD data format, make it open-source and publicly available, and recommend that Congress formally adopt the standard to address the Gobeille v Liberty Mutual Supreme Court decision that limits state APCD participation.