Overview
This page provides the status of data file extract requests and CHIA’s APCD and Case Mix annual releases. CHIA updates this page when there are significant changes to either the releases or the request queue.
You may also sign up to receive email updates for information on both data requests and annual releases.
Please note that it can take from five to seven days to create each extract file and that some customer requests require multiple extracts. Priority is given to state agencies followed by data submitters and then to independent researchers.
- For additional information regarding the MA APCD, please see the MA APCD documentation archive and the MA APCD data submission guides.
- For more information regarding Case Mix data, please see the Case Mix data documentation archive and the Hospital Case Mix data specification manuals.
Data Requests in Process
This information was updated on: 07/9/2026
If you have questions regarding your data extract request, please email:
- For MA APCD requests: apcd.data@chiamass.gov
- For Case Mix requests: casemix.data@chiamass.gov
Annual Release Status
MA APCD Releases
| Product | Target | Actual | Status |
|---|---|---|---|
MA APCD CY 2025
|
Fall 2026 |
Fall 2026 |
In Progress
|
Release Status Notes
|
|||
| Product | Target | Actual | Status |
MA APCD CY 2024
|
Fall 2025 |
Fall 2025 |
Available
|
Release Status Notes
|
|||
Case Mix Releases
| Product | Target | Actual | Status |
|---|---|---|---|
Case MixFY 2025
|
|||
| Hospital Inpatient Discharge Data (HIDD) |
June
2026 |
May
2026 |
Available
|
| Emergency Department Data (EDD) |
August
2026 |
–
|
In Progress
|
| Outpatient Observation Stay Data (OOD) |
September
2026 |
– | In Progress |
Release Status Notes
|
|||
| Product | Target | Actual | Status |
Case Mix FY 2024
|
|||
| Hospital Inpatient Discharge Data (HIDD) |
June
2025 |
May
2025 |
Available
|
| Emergency Department Data (EDD) |
August
2025 |
July
2025 |
Available
|
|
Outpatient Observation Stay Data (OOD) |
September
2025 |
August
2025 |
Available
|
Release Status Notes
|
|||
Data Request and Delivery Totals
| Calendar Year | File Extracts | MA APCD | Case Mix | Total |
|---|---|---|---|---|
| CY 2026
(As of July 9, 2026) |
Requests Delivered |
17
|
30
|
47
|
| Requests in the Queue |
4
|
13
|
17
|
|
| Total Requests |
21
|
43
|
64
|
|
| CY 2025 | Requests Delivered | 51 | 139 | 190 |
| CY 2024 | Requests Delivered | 37 | 250 | 287 |
| CY 2023 | Requests Delivered | 43 | 216 | 259 |
| CY 2022 | Requests Delivered | 44 | 297 | 341 |
| CY 2021 | Requests Delivered |
18
|
247
|
265
|
| CY 2020 | Requests Delivered |
39
|
89
|
128
|
Recommended
MA APCD
Learn about the Massachusetts All Payer Claims Database, including what data is collected, how to request access, and how to submit claims data to CHIA.
Case Mix
Access Massachusetts hospital case mix data, including inpatient discharge, emergency department, and outpatient observation datasets, documentation, and data specification manuals.
Databases
Explore the health care datasets CHIA collects and maintains, including the All Payer Claims Database, Case Mix, and cost reports.