Behavioral Health Facilities Case Mix Data

Report Resources

Behavioral Health Facility Case Mix
Submission Deadlines

Begin & End Dates


Oct. 1st - Dec. 31st
March 16th
Jan. 1st- March 31st
June 14th
April 1st - June 30th
Sept. 13th
July 1st - Sept. 30th
Dec. 14th


CHIA collects behavioral health facility data from participating providers on patient demographics, diagnoses and procedures, physicians, and charges for each inpatient discharge in Massachusetts. Facilities must submit data in accordance with the requirements of the Behavioral Health Inpatient Data Submission Specification Guidelines. These guidelines set forth the file format, record specifications, data elements, definitions, code tables, and edit specifications.

Please see the Behavioral Health Inpatient Data Submission Specification Guidelines link in the blue box on the right side of this page. Facilities will be required to submit data on a quarterly basis, following a standard hospital fiscal year schedule (October 1 – September 30).


Filing Application

Behavioral health facilities submit their Case Mix data through CHIA Submissions, CHIA’s web-based transaction service. To do this:



Completed agreement forms need to be emailed to For more information about CHIA’s web transaction interfaces (e.g. CHIA-INET, CHIA Submissions), see CHIA-INET and CHIA Submissions Questions & Answers.

Please Note:

Behavioral health data submitters will need to install FileSecure Version 2 to encrypt data before submitting it to CHIA. Please see Behavioral Health File Encryption and Submission Instructions available in the "Report Resources" box on the right of this page. If you have questions, please call (617) 701-8100 or email

CHIA occasionally hosts Case Mix Technical Assistance Group (TAG) webinars where hospitals or facilities can ask questions regarding provider data submissions. In the "Report Resources" box on the right of this page you can link to information on how to participate in future webinars and review presentation materials from previous TAG sessions.



Please call (617) 701-8100 or email regarding either Case Mix Hospital or Behavioral Health Facility submissions.