CO-33: Insured Has No Dependent Coverage

What Does CO-33 Mean?

With CO (Contractual Obligation), the CARC 33 adjustment is the provider's responsibility. The payer denied or reduced payment because of the subscriber has an individual-only insurance plan with no dependent coverage option elected. The patient is not liable for this amount. If the denial is in error, the provider can correct and resubmit the claim or file an appeal with supporting documentation.

CARC 33 indicates insured has no dependent coverage. The payer determined that the service or a portion of it does not meet coverage criteria under the patient's current plan benefits or the applicable coverage rules.

Common scenarios that trigger this adjustment include: the subscriber has an individual-only insurance plan with no dependent coverage option elected; The subscriber did not elect or purchase dependent coverage during enrollment; The specific insurance plan type does not include dependent coverage options. The group code paired with CARC 33 determines who bears the financial responsibility — CO places it on the provider as a contractual obligation, PR shifts it to the patient, OA indicates a coordination of benefits or other payer adjustment.

Common Causes

How to Resolve

1. Review the remittance details Examine the CO-33 adjustment and any accompanying RARC codes to identify the specific reason for the denial.
2. Identify the root cause Determine which issue applies: individual-only policy, dependent coverage not purchased, plan does not offer dependent coverage.
3. Correct the claim Address the identified issue — update the claim data in your billing system to resolve the insured has no dependent coverage problem.
4. Resubmit the corrected claim Submit the corrected claim following the payer's resubmission guidelines. Include any supporting documentation that addresses the denial reason.
5. Appeal if the original claim was correct Appeal with enrollment documentation showing dependent coverage was elected, including enrollment forms and plan confirmation.

Common RARC Pairings

The RARC code tells you exactly what triggered the CO-33:

How to Prevent CO-33

• Verify dependent coverage during eligibility check
• Confirm plan type includes dependent benefits
• Check if the patient billed is actually the subscriber vs dependent
• Use real-time eligibility verification

Also Filed As

The same CARC 33 may appear with different Group Codes:

Related Denial Codes