CERT (Comprehensive Error Rate Testing)
Comprehensive Error Rate Testing
The CMS program that measures the Medicare fee-for-service improper payment rate.
1 min read · Last reviewed May 23, 2026
At a glance
- Category
- Denials & Appeals
- Acronym for
- Comprehensive Error Rate Testing
- Primary sources
- 1
- Workspace handoff
- denial workbench →
Where this comes up
This is denial-workbench territory. A remit posts with a CARC/RARC, the biller decides whether to rebill, appeal, or write off, and the appeal packet has to cite the chart, the order, and the payer's own policy language. Recurring patterns trace back to an upstream workflow gap.
Full definition
What it is in practice
CMS CERT samples claims, requests medical records, and reviews for coverage, coding, and documentation compliance. The annual error-rate report drives policy and audit priorities.
How it shows up in your practice
When you receive a CERT records request, respond completely within the deadline. Missing documentation is treated as an improper payment.
Sources
- CMS — Comprehensive Error Rate Testing (CERT)https://www.cms.gov/medicare/audits-compliance/cert
Manage CERT requests in the Denial Workbench
Open denial workbench →Related terms
- Denials & AppealsRecovery Audit Contractor (RAC)CMS contractors who identify and recover improper Medicare payments through review of paid claims.
- Denials & AppealsUPIC (Unified Program Integrity Contractor)CMS contractors that investigate and address fraud, waste, and abuse in Medicare and Medicaid.
- CodingMedical NecessityThe standard requiring that services be reasonable and necessary for the diagnosis or treatment of illness or injury or to improve the functioning of a malformed body member.
D3rx is a healthcare-billing and compliance research aid maintained by D3rx Inc. Articles are drafted by an LLM (Anthropic Claude) against primary HHS, OCR, CMS, eCFR, NIST, and state-regulator publications, and reviewed for restraint and source fidelity by the D3rx team.
Reviewer status: a named credentialed reviewer (CHC, CHPC, or healthcare attorney) is being engaged. Until that engagement is finalized, this page does not claim credentialed review.
Related across the archive
- GlossaryRecovery Audit Contractor (RAC)CMS contractors who identify and recover improper Medicare payments through review of paid claims.
- GlossaryUPIC (Unified Program Integrity Contractor)CMS contractors that investigate and address fraud, waste, and abuse in Medicare and Medicaid.
- GlossaryMedical NecessityThe standard requiring that services be reasonable and necessary for the diagnosis or treatment of illness or injury or to improve the functioning of a malformed body member.
- GlossaryAudit DefenseThe organized process of preparing for and responding to a payer or government audit.
- BillingHow to Appeal an Insurance Denial: Step-by-Step GuideClaim denied? Step-by-step appeal process with payer deadlines, denial code fixes, appeal letter template, and escalation options.
- BillingMedical Billing Denial Codes: What They Mean and How to Fix ThemCO-4, CO-97, CO-16, PR-96 and more. What each denial code means and exactly how to fix it.
- Glossary835 Electronic Remittance Advice (ERA)The HIPAA-mandated electronic transaction by which payers communicate payment and adjustment information to providers.
- GlossaryABN (Advance Beneficiary Notice of Non-coverage)A standardized notice (CMS-R-131) given to Medicare fee-for-service beneficiaries before furnishing a service Medicare may not cover.
This glossary entry is a research aid for billing and compliance staff. It does not provide legal, medical, or financial advice and does not replace counsel. References cited link to primary sources at HHS, OCR, CMS, eCFR, NIST, and the relevant payer or industry body.