CARC 59 denial code: meaning & whether to appeal (verified)
What CARC 59 means
Processed based on multiple or concurrent procedure rules.
Verbatim description from the official X12 Claim Adjustment Reason Codes list.
Classification
Denial class: bundling / coding edits
Appealability verdict
Appealable — bundling / coding edits
What to know
These turn on the payer's own edit rules: the NCCI Policy Manual and modifier indicators often support separate payment as billed. The appeal argues the edit was misapplied — no code changes are involved.