This chart visualizes HEDIS technical specification changes and NCQA's guidance on year-over-year (YoY) trending.
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Line: Connects years where YoY trending may be a reliable indicator of changes in quality. (Absence of a line indicates YoY changes may be attributed to measurement differences).
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Red Bubble: Significant spec change, NCQA requires a break in trending.
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Orange Bubble: Moderate spec changes; NCQA advises caution regarding trending.
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Yellow Bubble: Some spec changes did occur, but no specific NCQA trend guidance recorded (Review Changes).
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Purple Bubble: Measure redesigned (officially seen as distinct measure by NCQA). Linked here visually for continuity..
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Grey Bubble: No changes impacting trending noted for this year.
Hover or click on bubbles for details. Click again to dismiss pop up.
Notes:
- HEDIS MY2020 & MY2021 specifications were released jointly during the pandemic and are displayed as MY2021.
- The displayed NCQA MYyyyy specification years often do not directly align with the Alliance Community Checkup reporting periods.
- The visualization does not reflect potential issues with trending due to changes in the composition of the Alliance database year to year (e.g., data supplier inclusion/exclusions).
