CO-129Contractual Adjustment
Prior processing information appears incorrect
What this code means
The insurer found inconsistencies in how a previous related claim was processed, affecting this claim.
What to do next
Request a detailed explanation from your insurer of which prior claim is affecting this one. Ask your provider billing department to clarify the claim history and resubmit with corrected information.
Recommended tool
Bill Advantage can analyze your denial and generate a ready-to-send appeal or dispute letter in minutes.
Open Insurance Statement Decoder