As I read the measures, I haven’t yet encountered anything I think can’t be directly supported within ATLAS given all of the enhancements that @Chris_Knoll has made to the standard cohort definition module.
I am not familiar with the latest changes by Chris. But to facilitate identifying potential “things that can’t be directly supported within ALTAS” I want to point out some sophisticated aspects of certain HEDIS rules. Representing these may require changes to ATLAS and/or the data model.
Utilization and risk adjusted utilization
HEDIS defines utilization using “member months” as the denominator (e.g. Visits / 1000 member months). Calculation of member months is sophisticated, and depends on administrative data reflecting membership of patients (I am not sure if it is contained in the OHDSI data model); without it, several utilization metrics in HEDIS cannot be correctly calculated.
Resource use
The resource use metrics require “standard price” and “standard cost” values to be available for various services. Factors such as payer liability, member cost sharing, etc. can complicate their calculation. My understanding is that an “average” number is often used, based on some cost algorithm, and the number is updated on some frequency. Do we have a way to store and use cost/price data in ATLAS?
Denied claims
Take the NCS metric in the “Overuse/Appropriateness” group as an example. The metric requires excluding denied claims. Does the data model have a way to represent which claims were denied? Does ATLAS have a way to account for it?