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Reduce the CERT Error Rate: Avoid These Common Errors

CGS Operation: Reduce the Error Rate

CERT Audit Deadlines for Reporting Year 2025

For claims submitted to CERT July 1, 2023 – June 30, 2024:

  • Late Documentation Deadline: August 8, 2025
    • Send extra or late documents to CERTExternal website to resolve the audit by this date.
  • Appeals Deadline: September 9, 2025
    • MACs must report completed appeals to CERT by this date. These appeals impact the national error rate.
    • See the Supplier Manual, Chapter 13 PDF for information on appeals.

CGS Provider Education is committed to helping suppliers avoid claim denials and overpayments from Comprehensive Error Rate Testing (CERT) reviews.

CGS Operation: Reduce the Error Rate is an innovative approach to eradicate common CERT errors, through data analysis and education.

We created this page to help you avoid common documentation and billing errors. We will update this page with more tips as we find additional issues.


Help Us Help You!

It is a combined effort between the CERT contractor, CGS, and DMEPOS suppliers to reduce the error rate.

CGS offers a variety of educational resources to help suppliers stay compliant.

  • Medical Review Education Programs
    • CGS Connect Program: This is a unique service for suppliers seeking professional review and evaluation of pre-claim documentation before submitting a claim to Medicare.
    • Provider 360: This program helps suppliers reduce or stop claim denials and errors by way of "lean" education.
  • Online Education Portal
    • These online courses are great training tools for new staff as well as seasoned suppliers to brush up on Medicare knowledge. The best part of online education courses is that they are available 24 hours a day 7 days a week!
  • DME Provider Outreach & Education: Calendar of Events
    • Includes listings of policy-based and general topic webinars associated with the Medicare program, such as Documentation Requirements, Prior Authorization, Self-Service Tools and much more!
  • Video Education
    • Have a minute? That's all it takes to listen to video education from the CGS Medical Directors.

Updated: 05.06.2025

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