IDSS Data Submission and Audit Report Requirements. In accordance with 42 CFR 438.606, the MCP shall submit a signed data certification letter to ODM attesting to the accuracy and completeness of its audited HEDIS IDSS data submitted to ODM. The MCP shall also submit to ODM a signed data certification letter attesting to the accuracy and completeness of its final HEDIS audit report (FAR) submitted to ODM. Each data certification letter is due to ODM on the same day the respective HEDIS IDSS data/FAR is to be submitted. For complete instructions on submitting the data certification letters, see ODM Methodology for MCP Self-Reported, Audited HEDIS Results.