Required exclusions identify members who must be excluded from the measure, regardless of numerator compliance. They are listed as part of the eligible population criteria because members who meet the required exclusion criteria are removed when identifying the denominator of the measure. Optional exclusions should only be used to remove members that did not meet the measure's numerator criteria. Organizations may choose to apply optional exclusions, which are listed separately at the end of the measure specification, or may choose not to apply the exclusions.
HEDIS 2013