Copied from JIRA CQM-1781 -- The ED visit start should be based on arrival to the ED, the timestamp in the EHR that most closely captures the date and time the patient arrives to the ED. The ED visit end should be based on when the patient physically leaves the ED, the timestamp in the EHR that most closely captures the date and time the patient leaves the ED.

Currently we use the times when a patient is transferred out of the ED to the Observation Unit for ED-1 and ED-2 Discharge Time. In the manually abstracted ED-1 and ED-2 specifications it states: "For patients who are placed into observation outside the services of the emergency department, abstract the date of departure from the emergency department." For eCQM, we were informed that the Emergency Department Visit value set used with discharge date/time, only includes one code: Emergency department patient visit (procedure) (4525004). Does this mean we cannot use the time transferred out of the ED to go to Observation as the discharge time?