The Center for Health Information and Analysis (CHIA) collects patient-level data for Massachusetts acute care hospital inpatients, observation patients, and emergency room patients to support CHIA's analyses of such issues as preventable hospitalizations, hospital market analysis, alternative care settings, the patient care continuum, and comparative costs and outcomes in acute care hospitals.
CHIA collects data related to inpatient hospital discharges, outpatient observation stays, and emergency department visits pursuant to regulation. Hospitals report their data to CHIA on a quarterly basis for the fiscal year beginning on October 1. CHIA prepares the annual database for each of the three data types available to the public. Data submissions are edited, summarized, and returned to the submitting hospital to verify the accuracy of the records.
All three clinical databases are available to the public. It is highly recommended that all applicants review regulation prior to submitting a database request. This regulation established policies and procedures for review of applications for hospital clinical data. As a part of each application request, applicants must guarantee that patient privacy will be protected and are required to demonstrate that the purpose of the request is in the public interest including financial studies, surveillance of hospitals, health planning and resource allocation studies, epidemiological studies, and health care research.