Median Time from ED Arrival to ED Departure for Admitted ED Patients

Last updated: May 3, 2018

CMS Measure ID: CMS55v3
Version: 3
NQF Number: 0495
Measure Description:

Median time from emergency department arrival to time of departure from the emergency room for patients admitted to the facility from the emergency department.

Initial Patient Population:

All patients discharged from acute inpatient care with Length of Stay (Discharge Date minus Admission Date) less than or equal to 120 days.

Measure Population:

Any ED Patient from the facility’s emergency department

Measure Observations:

Time (in minutes) from ED arrival to ED departure for patients admitted to the facility from the emergency department.

Denominator Statement:

Not Applicable

Denominator Exclusions:

Not Applicable

Numerator Statement:

Not Applicable

Numerator Exclusions:

Not Applicable

Denominator Exceptions:

Not Applicable

Measure Steward: Centers for Medicare and Medicaid Services
Domain: Person and Caregiver-Centered Experience Outcomes
Short Name: ED1
Next Version:
Measure Score: Continuous Variable
Score Type: Process
Improvement Notation:

A decrease in the median value indicates less time in the emergency department and enhanced throughput.


This measure specification defines how to determine an individual Emergency Department stay. Reporting requires the median of all patient stays [Encounter: encounter ED] arrival date and time - [Encounter: encounter ED] ED departure date and time.

Calculate the ED time in minutes for each person in the measure population; report the median time for all calculations performed. The specification provides elements from the clinical electronic record required to calculate for each ED encounter, i.e., the length of time the patient was in the Emergency Department, also stated as: the TIMEDIFF for the Emergency Department departure time minus the Emergency Department arrival time. The calculation requires the median across all ED encounter durations.


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