Each HEDIS season, a compilation of IDSS file updates are posted for Health plans submitting HEDIS data to NCQA. These files are referenced by health plans and HEDIS certified vendors and auditors to utilize during the IDSS process.
Below are the Final HEDIS MY 2021 IDSS files. Changes to the files compared to the previous year can be found in the crosswalk section. More information on measure specific changes can be found in the HEDIS Volume 2 Technical specification. The IDSS system will be available in March 2022.
Submission Files
- FINAL Commercial MY2021
- FINAL Exchange MY2021
- FINAL LTSS MY2021
- FINAL Medicaid MY2021
- FINAL Medicare MY2021
Schema Files
- FINAL Commercial MY2021
- FINAL Exchange MY2021
- FINAL LTSS MY2021
- FINAL Medicaid MY2021
- FINAL Medicare MY2021
Data Dictionary
- FINAL Commercial MY2021
- FINAL Exchange MY2021
- FINAL HEDIS Indicator MY2021
- FINAL HEDIS Measure MY2021
- FINAL LTSS MY2021
- FINAL Medicaid MY2021
- FINAL Medicare MY2021
- FINAL HEDIS Supporting Document
Crosswalks
- FINAL Commercial crosswalk MY2021
- FINAL Medicaid crosswalk MY2021
- FINAL Medicare crosswalk MY2021
- FINAL Exchange crosswalk MY2021
- FINAL Medicaid LTSS crosswalk MY2021
- FINAL HEDIS Indicator crosswalk MY2021
- FINAL HEDIS Measure crosswalk MY2021
- FINAL Calculation Specifications Crosswalk MY2021
- FINAL Validation Metadata Crosswalk MY2021
Validations
Calculations
Results Files
- FINAL Commercial Results MY2021 – .xml version
- FINAL Exchange Results MY20201 – .xml version
- FINAL LTSS Results MY2021 – .xml version
- FINAL Medicaid Results MY2021 – .xml version
- FINAL Medicare Results MY2021 – .xml version