N56N-series (general use)Coding & Bundling
N56: Wrong procedure code for service or date
The billed code isn't correct or valid for the service described or the date it occurred — deleted codes and wrong-year billing are typical.
Commonly appears with these denial codes
The denial code gives the category; N56 pinpoints the specific problem. Read them together before touching the claim.
What to do about it
Recode using the code set valid on the DOS and ensure the code matches the documented service. Resubmit corrected.
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