This may not address your question, but just wanted to pass along
that for our ACO data, we have been using Analysis of Means types of charts
to find outliers in our metrics by provider or by clinic location:
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If you are looking for public health data, countyhealthrankings.org and communitycommons.org are great resources. The county health rankings site also has a nice methodology (z-scores) for determining if a community is doing better or worse than average for a particular measure.