The acute care hospital emergency department data dashboard contains data through December 2025. The primary purpose of this series is to provide timely patterns and trends on key emergency department (ED) utilization measures.
CHIA’s Emergency Department Database (EDD) consists of ED visits from all acute care hospitals in Massachusetts resulting in neither an inpatient admission nor an observation stay—commonly referred to as treat-and-release visits. Acute care hospitals submit data quarterly to CHIA’s Case Mix databases including information on patient socio-demographics, diagnostic information, treatment and service information, and hospital charges.
This interactive dashboard presents analyses on a quarterly basis on measures of ED utilization and visit characteristics at a statewide level and for select analyses at the hospital level. The data in the quarterly updates are preliminary.
Updated Published May 28, 2026
Hospital Inpatient Discharge Reporting
Outpatient Observation Reporting
