What is a CPT and ICD-10 coding audit?
A coding audit is a systematic clinical and administrative review of patient medical records against submitted claims to verify that diagnostic (ICD-10-CM) and procedural (CPT/HCPCS) codes accurately reflect documented clinical care, medical necessity, and payer reimbursement policies.
1. The Dual Danger: Upcoding Liability vs Downcoding Revenue Leakage
Physicians face pressure from both sides: submitting codes higher than clinical documentation supports (upcoding) violates the False Claims Act and triggers OIG clawbacks.
Conversely, providers who routinely downcode Level 4 encounters (99214) to Level 3 (99213) out of fear of audits lose between $35 and $50 per encounter—amounting to over $30,000 annually per full-time provider.
2. The 10-Point 2025 Coding Audit Checklist
Audit your charts against these criteria quarterly
Conduct routine random sampling (10 to 20 charts per provider per quarter) covering:
- 1. Chief Complaint & History: Is the reason for visit clearly articulated by the patient?
- 2. Medical Decision Making (MDM): Does documentation support the Number & Complexity of Problems Addressed, Amount of Data Reviewed, and Risk of Complications?
- 3. Time-Based Coding Verification: If billing based on time, is total provider face-to-face and non-face-to-face time explicitly documented on the encounter date?
- 4. Specificity of ICD-10-CM: Are non-specific codes (.9) avoided when clinical notes identify laterality (left/right), encounter type (initial/subsequent), or underlying etiology?
- 5. NCCI Unbundling Checks: Are procedures that are inherently included in a primary service unbundled without justification?
- 6. Modifier 25 Validation: When billing 99213/99214 with a minor procedure (e.g., joint injection, lesion biopsy), is there a separate, distinct clinical problem clearly documented?
- 7. Incident-To Compliance: Are non-physician provider visits under direct physician supervision compliant with CMS guidelines?
- 8. Signature & Date Authenticity: Are all charts signed and locked within 24 to 48 hours of service?
- 9. Prior Authorization Alignment: Does the procedure performed match the exact CPT approved by the payer?
- 10. ABN Form Execution: Was an Advance Beneficiary Notice secured prior to delivering non-covered services to Medicare beneficiaries?
3. How Med Billing Solution LLC Conducts Zero-Disruption Audits
Our team of Certified Professional Medical Auditors (CPMA) conducts comprehensive chart-to-claim audits. We deliver an Executive Coding Scorecard highlighting over-coding risks, under-coding revenue opportunities, and targeted physician documentation coaching.