CARC 221CO · Contractual ObligationDeactivated 2014-07-01
The claim was placed under investigation by the property & casualty payer, delaying payment.
- Common causes
- Suspected fraud, unclear liability, or other flags triggered a formal claim investigation.
- Suggested fix
- This code was deactivated by X12 in 2014. On legacy remittances, respond promptly to any information requests from the payer's investigation unit to resolve the claim.
Related Contractual Obligation codes
107This claim depends on another related claim or service being referenced, but that link wasn't provided.11The diagnosis code doesn't support medical necessity for the procedure billed, based on the payer's coverage edits.13The claim shows a date of service after the patient's recorded date of death.146The diagnosis code billed wasn't a valid, active code as of the date of service.150The documentation submitted doesn't justify the complexity or level of the service billed, commonly seen with evaluation and management visit levels.16The claim is missing required information or contains a billing error that prevented the payer from processing it.170This payer doesn't reimburse this specific provider type for this service.171This payer doesn't cover this service when it's billed by this provider type in this particular facility setting.
Frequently asked questions
What does CARC 221 mean?
The claim was placed under investigation by the property & casualty payer, delaying payment.
How do I resolve CARC 221?
This code was deactivated by X12 in 2014. On legacy remittances, respond promptly to any information requests from the payer's investigation unit to resolve the claim.
Why does CARC 221 happen?
Suspected fraud, unclear liability, or other flags triggered a formal claim investigation.
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.