National Guideline Clearinghouse
organization
National Guideline Clearinghouse (NGC) was a database of evidence-based clinical practice guidelines and related documents started in 1998. It ended July 18, 2018 due to loss of federal funding (as well as for the National Quality Measures Clearinghouse [NQMC]). The entire content of the NGC was available free of charge at The Alliance for the Implementation of Clinical Practice Guidelines. This site will begin uploading more current references in April 2020.
Historically, it had been maintained as a public resource by the Agency for Healthcare Research and Quality (AHRQ) of the U.S. Department of Health and Human Services. The NGC aimed to provide physicians, nurses, and other health professionals, health care providers, health plans, integrated delivery systems, purchasers and others an accessible mechanism for obtaining objective, detailed information on clinical practice guidelines and to further their dissemination, implementation and use. The database was updated weekly with new and revised guidelines. The currency of all guidelines was verified annually through NGC's Annual Verification process.
The site featured:
A Guideline Comparison utility that gives users the ability to generate side-by-side comparisons for any combination of two or more guidelines
Guideline Syntheses prepared by NGC staff, comparing guidelines covering similar topics, highlighting areas of similarity and difference. NGC Guideline Syntheses often provide a comparison of guidelines developed in different countries, providing insight into commonalities and differences in international health practices.
This brief starts where responsible research should: with the source description of “National Guideline Clearinghouse” as organization. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the history & society register because the source frames it as organization. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Contemporary correspondence, administrative files and participant testimony can test how later narratives organized the event or institution. The source revision retrieved here is dated Jan 25, 2026. The linked authority identifier is Q6972965. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1998, 2018 and 2020.
Later summaries often reconcile disputed chronology or motive more neatly than the contemporary record permits. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
How to read it
Compare institutional narratives with records created by participants and affected communities. Dates and formal titles are useful anchors, but not substitutes for context.
- Event chronology
- Institutional context
- Locating named record creators
Contemporary correspondence, government or organizational records, oral histories and cited historical scholarship.
Three-step research path
- Establish the record: confirm the title “National Guideline Clearinghouse”, its source revision and the description used here.
- Expand the search: follow National Guideline Clearinghouse primary sources, National Guideline Clearinghouse archive and National research across catalogues and specialist indexes.
- Test the account: compare the strongest cited source with the responsible institution’s current record and note any disagreement.
Questions for further research
- Which source most directly establishes the central claim about “National Guideline Clearinghouse”?
- Who created the surviving record, and for what administrative purpose?
- Which voices are present, absent or mediated by the institution?
Search terms from this dossier
This entry incorporates text from “National Guideline Clearinghouse” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.