A medical coding audit is an independent review of coded charts against the documentation, official coding guidelines, and payer policy.
The point is not the score. Any audit can return an accuracy percentage. A useful audit returns the pattern behind the errors: the specialty, the provider, the documentation gap, or the rule that keeps producing the same denial.
Audits run before the claim goes out (pre-bill) or after (post-bill), and they range from broad compliance reviews to payer-specific and specialty-specific deep dives.
Four audits, four questions they answer
- Pre-bill audit: Charts are reviewed before submission, so errors are corrected before they become denials.
- Post-bill audit: Submitted charts are reviewed to quantify accuracy, surface systematic errors, and find undercoding that paid but paid less than the encounter earned.
- Compliance audit: A focused review against coding guidelines, NCCI edits, MUE limits, and coverage policy.
- Payer or specialty audit: A deep dive on one payer's rules or one specialty's documentation, where denials or underpayments concentrate.
How MediCodio audits a chart
Step 01: Charts are re-coded against the documentation
The audit re-derives the correct codes from the same documentation the original coder saw.
Step 02: Every finding is traced to its cause
Each error is logged against the specialty, provider, documentation gap, or rule that produced it.
Step 03: Credentialled auditors make the call
AAPC- and AHIMA-credentialled coders and auditors apply official guidelines and payer policy.
Step 04: Findings come back as actions
The result is a set of root causes and the documentation or coding changes that address them.
The AI finds the outliers. The auditor makes the call.
MediCodio pairs CODIO with certified auditors. The AI validates code sets against NCCI, MUE, and LCD/NCD policy at scale and surfaces the charts most likely to carry an error, so the audit sample is not random and the auditor's time goes where the risk is.
A credentialled auditor then reviews each flagged chart against the documentation and makes the determination. Every code decision carries the documentation passage and the rule behind it, so a finding can be defended rather than asserted.
Accuracy
MediCodio reports 98%+ first-pass coding accuracy across deployments since 2023, measured at the code level on production charts against a reference review by AAPC- and AHIMA-credentialled coders. Coverage spans 35+ specialties.