United States Health Information Knowledgebase


The United States Health Information Knowledgebase (USHIK) is an on-line, publicly accessible registry and repository of healthcare-related metadata, specifications, and standards. USHIK is funded and directed by the Agency for Healthcare Research and Quality (AHRQ) with management support and engagement from numerous public and private partners.

November 14, 2014

  • USHIK has been updated to include several new features and enhancements, including:
    • Comparison downloads of APCD Data Elements and File Specifications are now available in the APCD Portal
    • Simplifications for viewing the ASC X12 5010 Data Element Dictionary in the Standards portal
    • Various other minor enhancements and bug fixes

October 31, 2014

  • Meaningful Use Portal
    • On October 31st a Meaningful Use issue in USHIK was corrected wherein certain Quality Data Elements (QDEs) were incorrectly linked to multiple Value Sets. Only QDEs from the April and July 2014 releases of electronic Clinical Quality Measures (eCQMs) were affected. The affected QDEs included negation rationale attributes. For these QDEs, USHIK indicated the correct linkage to the correct Value Set as well as an extra, incorrect linkage to an additional Value Set. For example, a QDE associated with CMS2v4, "Risk Category Assessment not done: Medical reason contraindicated" was correctly linked to the "Medical reason Contraindicated" Value Set; however, the Value Set "Adult Depression Screening" was incorrectly linked to this QDE as well. This issue was present on USHIK screens and within USHIK downloads. Please note that we are not aware of any errors with eCQMs, QDEs or Value Sets in USHIK; this issue was consisted only of an extra, incorrect Value Set linkage for a particular subset of QDEs. We believe that the issue has been completely resolved throughout USHIK, including all screens and download files. We apologize for any inconvenience this may have caused and thank you for your continued usage of USHIK. If you have questions or concerns about this issue or our resolution, please contact us with the Feedback mechanism on the USHIK website.

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The Meaningful Use portal contains specifications, artifacts, downloads, search tools, and other resources for Meaningful Use, including Clinical Quality Measures, Value Sets, and Objectives for Stage 1 and Stage 2.

USHIK will continue to be updated with new Meaningful Use specifications as they are released by CMS and VSAC during the annual update periods in 2015.

USHIK's APCD portal contains APCD File Submission Specifications from 14 states. Several of these states contain multiple versions of their file specifications allowing a stakeholder to compare the changes that have occurred over time. The APCD portal allows a stakeholder to view, compare, search and download the file specifications and data elements.

All Payer Claims Database

The Draft Measures portal in USHIK contains electronic Quality Measures that are available to the public for feedback. All feedback is submitted to CMS for review.

USHIK has recently added functionality to allow measure developers to post MAT-exported draft measures in USHIK directly. USHIK users who are interested in learning more about this "Draft Measure Self-Service" are encouraged to contact the USHIK team using the Feedback / Help link at the top of each page.

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