CARC 59CO · Contractual Obligation

Payment was adjusted because multiple procedures were performed together, and the payer's multiple-procedure or concurrent-procedure rules applied.

Common causes
Standard payer rules reduce payment for additional procedures performed in the same session, such as a reduction on secondary surgical procedures.
Suggested fix
Verify the procedures were correctly sequenced as primary versus secondary and that appropriate modifiers were used; this reduction often doesn't require action if applied correctly.

Related Contractual Obligation codes

Frequently asked questions

What does CARC 59 mean?

Payment was adjusted because multiple procedures were performed together, and the payer's multiple-procedure or concurrent-procedure rules applied.

How do I resolve CARC 59?

Verify the procedures were correctly sequenced as primary versus secondary and that appropriate modifiers were used; this reduction often doesn't require action if applied correctly.

Why does CARC 59 happen?

Standard payer rules reduce payment for additional procedures performed in the same session, such as a reduction on secondary surgical procedures.

CARC codes maintained by X12 (x12.org). Descriptions on this site are original reference interpretations. Always verify codes with authoritative sources before making billing decisions.