Denial Code 21: What It Means and What to Do
If you are looking up code 21, here is what it means and what to do next. This is usually a patient-cost or contractual amount, but if it looks wrong, we can help you check.
Denial code 21 means: Your plan says this injury or illness is the responsibility of a no-fault carrier, such as auto no-fault coverage, rather than your health insurance.
Why it happens: Patients typically see this after a motor vehicle incident where no-fault auto coverage is expected to pay the claim.
Is it appealable? This code reflects a patient-cost or contractual amount, not a denial you appeal directly. If you believe it was applied in error, the underlying claim can be reviewed.
What to send: the missing element for this code, a short appeal letter citing the plan's claims-procedure rules, and any clinical support.
Note: code 21 may appear on your remittance with a group-code prefix such as PR-21 (patient responsibility) or CO-21 (contractual obligation). The denial reason is the same.
Think this was applied in error?
A senior reviewer can check your bill and the underlying claim for errors. $0 upfront, with no obligation.
Get help with code 21Frequently asked questions
- What does denial code 21 mean?
- Your plan says this injury or illness is the responsibility of a no-fault carrier, such as auto no-fault coverage, rather than your health insurance.
- Is denial code 21 appealable?
- It is often not appealable directly, but the underlying claim may be.
- What should I send to appeal a code 21 denial?
- Supply the missing element for this code, a short appeal letter citing the plan's claims-procedure rules, and any clinical support. Apellica prepares and files this for you.