The 2027 Annual Update draft measure specifications are now available. Question and comment on Eligible Clinician eCQMs, Hospital - Inpatient eCQMs, and Hospital - Outpatient eCQM until December 19, 2025.
The denominator is the lower part of a fraction used to calculate a rate, proportion, or ratio. It can be the same as the initial population or a subset of the initial population to further constrain the population for the purpose of the measure. Continuous variable measures do not have a denominator, but instead define a measure population.