The diagnosis code used on your claim was not valid or had not been adopted yet on the date your service was performed.
Ask your provider to verify the correct diagnosis code for the date of service and resubmit. This is a coding error.
Appeal outlook: Very high when corrected
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Bill Advantage can analyze your denial and generate a ready-to-send appeal or dispute letter in minutes.
Open Medical Bill AnalyzerDenial codes on your EOB explain why a claim was denied. Learn what the most common codes mean in 2026 and the exact steps to fix or appeal each one.
Read articleWhat to Do When Insurance Denies a ClaimInsurance denied your claim? Learn the exact steps to appeal a health insurance denial in 2026, from reading the denial letter to external independent review.
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