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CARC
CO-59
CARC
CO — Contractual Obligation
Coding/Modifier
Quick Facts
Code
CO-59
Type
CARC
Category
Coding/Modifier
Status
Active
Processed based on multiple or concurrent procedure rules
What Does This Code Mean?
Payment was reduced because multiple procedures, multiple surgeries, or concurrent anesthesia rules applied.
Common Causes
- Multiple surgical procedures performed in the same session
- Concurrent anesthesia billed without required modifiers
Recommended Next Steps
- Confirm standard multiple-procedure payment reduction rules apply correctly
- Verify modifiers (51, 59, etc.) were applied where appropriate
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Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.