CO-39: Benefit Maximum Reached
CO (Contractual Obligation)What is CO-39?
CO-39 is a Contractual Obligation code indicating the patient has reached the benefit maximum for this type of service. The plan allows a limited number of visits, units, or dollar amount per year, and that limit has been exhausted.
Why Does CO-39 Occur?
- Annual visit limit reached (e.g., 20 physical therapy visits per year).
- Lifetime maximum benefit reached for a specific service category.
- Dollar cap on a benefit category exhausted.
How to Fix CO-39 Denials
- Check the patient's benefit accumulators on the payer portal to confirm the limit has been reached.
- If the limit is exhausted, inform the patient they are responsible for the remaining costs.
- If the limit is incorrect, appeal with documentation showing the correct benefit accumulator.
- For ongoing treatment needs, request a benefit extension or exception from the payer with clinical justification.
CO-39 by Payer
| Payer | Common RARC | Appeal Deadline | Notes |
|---|---|---|---|
| UnitedHealthcare | Varies | 60 days from remittance | Reconsideration required before formal appeal. |
| Anthem | Varies | 365 days from denial notice | Check state-specific provider manual for variations. |
| Aetna | Varies | 180 days from denial | Strict in-network filing enforcement. |
| Cigna | Varies | 180 days from denial | Cigna COB team: 1-800-244-6224. |
| Medicare | Varies | 120 days (redetermination at MAC) | Five levels of appeal starting with MAC redetermination. |
Related CARC Codes
If you are seeing CO-39, check these related codes: CO-16 (claim differs), CO-45 (fee schedule), CO-29 (timely filing).
Common Questions About CO-39
What does CO-39 mean?
CO-39 indicates benefit maximum reached. Check the RARC code on the EOB for the specific reason and follow the resolution steps above.
Can I appeal a CO-39 denial?
Yes. Commercial payers allow 60-365 days to appeal depending on the payer. Gather supporting documentation before filing. Medicare allows 120 days for a redetermination request.
Altair catches CO-39 denials before submission with benefit accumulator tracking. See how pre-submit claim scoring works.