Which patients should be included in the denominators calculated under the Observation Services Method and all ED Visits Method for the Medicare and Medicaid Electronic Health Record (EHR) Incentive Programs?
The all emergency department (ED) method includes all patients admitted to the inpatient department (POS 21) either directly or through the emergency department and all patients receiving services in the emergency department (POS 23).
Eligible hospitals and CAHs must select one of the methods for calculation and apply it consistently to denominators for measures. Providers cannot calculate the denominator of some measures using the "Observation Services method", while using the "All ED Visits method" for denominator of other measures. 5/12/2016 (FAQ2843)