How do I resolve a CO-46 denial?

Verify patient eligibility and benefits: Confirm the specific service is truly excluded from the patient's plan and that the payer applied the correct benefit structure at time of service Review contract language and fee schedules: Compare the denied service against your payer contract to confirm whether the non-coverage determination aligns with contractual terms File formal appeal with benefits documentation: If the service should be covered per plan documents, submit appeal with evidence of benefit coverage, medical necessity documentation, and contract references supporting coverage

835 Denial Combination

CO-46

Contractual Obligation · Service-Line Level Adjustment

Contractual Obligation

What This Combination Means

The payer has determined that the service(s) billed are not covered under the patient's contract or plan benefits. As a contractual obligation, the provider must write off the full billed amount and cannot transfer the balance to the patient. This is a non-covered benefit rather than a medical necessity or authorization issue.

Financial Responsibility

provider writeoff

The provider must absorb the entire adjustment amount per their contract with the payer. Patient billing for this amount is prohibited under the terms of the provider's participation agreement.

12%

Appeal Success

30-60 days (appeal process)

Avg. Resolution

Hard

Difficulty

Yes

Appealable

Step-by-Step Resolution

Steps tailored specifically to this CO-46 combination — not generic advice.

Appealable:Appealability depends on whether the service was billed correctly within the contracted fee schedule. If the provider believes the contract terms were misapplied, an appeal or corrected claim may recover payment.

1
Verify patient eligibility and benefits
Confirm the specific service is truly excluded from the patient's plan and that the payer applied the correct benefit structure at time of service
2
Review contract language and fee schedules
Compare the denied service against your payer contract to confirm whether the non-coverage determination aligns with contractual terms
3
File formal appeal with benefits documentation
If the service should be covered per plan documents, submit appeal with evidence of benefit coverage, medical necessity documentation, and contract references supporting coverage

Specialty Context

How CO-46 typically presents across different practice types.

Dental

Commonly appears for services excluded under dental plans such as cosmetic procedures, orthodontics on limited plans, or implants when not a covered benefit

Medical

Frequent for experimental treatments, cosmetic procedures, over-the-counter items, or services specifically excluded in plan documents regardless of medical necessity

Behavioral Health

May apply to excluded modalities (biofeedback, certain alternative therapies), services beyond plan limits, or non-credentialed provider types not covered under behavioral benefits

Individual Code References

View the standalone definition for each code in this combination.

CARC 46

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Synthesized from official definitions — not from training data

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