Denial Code 20: Liability Carrier Coverage Explained
Code 20 indicates that the patient's injury or illness is covered by a liability carrier, not the health insurance plan under which the claim was submitted. This means the liability carrier is responsible for the payment of this claim, and it should not have been submitted to the health insurer involved.
Who Pays: Group Code Liability
Code 20 shifts the claim away from the health plan because a liability insurer — auto, homeowner’s, or commercial — is responsible for the injury. It commonly arrives as OA-20 or PR-20, and either way the balance is not a write-off: bill the liability carrier handling the accident claim. Billing the patient directly is premature at this stage; if the liability coverage is denied or exhausted, resubmit to the health plan with documentation, and only what remains after that becomes patient responsibility under normal plan terms.
Why Claims Get Code 20
- The claim was submitted to the patient's health insurer instead of the liability carrier.
- Information about the liability carrier was missing or incorrect on the claim.
- The patient provided incorrect or incomplete information regarding the accident or injury.
- The claim lacked the necessary documentation to support liability coverage.
- The provider did not verify liability insurance coverage before submitting the claim.
How to Fix & Resubmit
- Verify the patient's liability insurance information, including policy number and carrier details.
- Check with the patient for any updates or corrections to their liability coverage information.
- Resubmit the claim to the correct liability carrier with the necessary supporting documentation.
- If liability coverage is not available, communicate with the patient about their responsibility for the bill.
- Ensure all claims related to the injury or illness are directed to the correct payer going forward.
Corrected Claim or Appeal?
For code 20, a corrected claim should be submitted to the appropriate liability carrier. An appeal to the health insurer is not applicable since the liability carrier is responsible for payment.
Preventing Future 20 Denials
- Always verify liability insurance details during patient registration and before claim submission.
- Train staff to recognize and capture complete accident or injury information from patients.
- Ensure documentation supporting liability coverage is included with the claim.
- Implement a system to identify and route claims to the correct liability carrier.