Clinical decision support (CDS) can impact the outcomes of care when used at the point of care in electronic medical records (EMR). CDS has been shown to increase quality and patient safety, improve adherence to guidelines for prevention and treatment, and avoid medication errors. Systematic reviews have shown that CDS can be useful across a variety of clinical purposes and topics. Despite broad national policy objectives to increase EMR adoption in the US, current adoption of advanced clinical decision support is limited due to a variety of reasons, including: limited implementation of EMR, CPOE, PHR, etc., difficulty developing clinical practice guidelines ready for implementation in EMR, lack of standards, absence of a central repository or knowledge resource, poor support for CDS in commercial EMRs, challenges in integrating CDS into the clinical workflow, and limited understanding of organizational and cultural issues relating to clinical decision support. To better understand and overcome these barriers, and accelerate the translation of clinical practice guideline knowledge into CDS in EMRs, the CDS Consortium is established to assess, define, demonstrate, and evaluate best practices for knowledge management and clinical decision support in healthcare information technology at scale - across multiple ambulatory care settings and EHR technology platforms.