Information for Data Submitters: Acute Hospital EHRD Dataset

Report Resources





CHIA collects hospital data on patient demographics, diagnoses and procedures, physicians, and charges for each inpatient discharge, outpatient observation stay, and emergency department visit in Massachusetts. Hospitals submit data in accordance with the requirements of the Data Submission Specification Manuals, which set forth the file format, record specifications, data elements, definitions, code tables, and edit specifications for each database.

Additionally, CHIA collects certain (Electronic Health Record Data) EHRD data. This data is shared with MassHealth in an Enhanced Demographics Data File in support of the MassHealth health equity program.



Please Note: CHIA hosted a webinar on May 16, 2024 to review the proposed changes. See the FY 2025 Case Mix Updates Webinar presentation (PDF) | PPT



Register to Submit EHRD Data to CHIA

New users must register to submit data via CHIA’s web-based transaction services. To register, each individual user filing for an organization must complete a Hospital User Agreement and email the completed agreement to


Questions and Comments

Please email all questions and comments to CHIA at