How do I resolve a CO-38 denial?

Verify provider's network status and designation: Confirm whether the rendering provider was in-network and designated as the patient's PCP or specialist at the time of service by checking the payer's provider portal or eligibility system. Obtain authorization documentation if applicable: Retrieve any prior authorization or referral records that demonstrate the services were properly authorized by the designated PCP or the payer before rendering services. Submit appeal with provider designation proof: File a formal appeal including provider network participation records, referral documentation, or authorization confirmation numbers showing the provider was properly designated or authorized for these specific services.

835 Denial Combination

CO-38

Contractual Obligation · Claim-Level Adjustment

Contractual Obligation

What This Combination Means

This adjustment indicates the claim was processed for services that were not provided or authorized by the member's designated network provider or primary care physician as required by the plan. The provider is contractually obligated to write off the adjusted amount because they were not the designated or authorized provider for these services under the patient's benefit structure.

Financial Responsibility

provider writeoff

The provider must write off the adjusted amount as a contractual obligation. The patient cannot be billed for this amount because the provider failed to meet network designation or authorization requirements.

35%

Appeal Success

30-60 days (appeal and documentation review)

Avg. Resolution

Hard

Difficulty

Yes

Appealable

Step-by-Step Resolution

Steps tailored specifically to this CO-38 combination — not generic advice.

Appealable:Services classified as not covered under the patient plan are generally not appealable unless the provider can show the service qualifies under a different benefit category or that coverage determination was incorrect.

1
Verify provider's network status and designation
Confirm whether the rendering provider was in-network and designated as the patient's PCP or specialist at the time of service by checking the payer's provider portal or eligibility system.
2
Obtain authorization documentation if applicable
Retrieve any prior authorization or referral records that demonstrate the services were properly authorized by the designated PCP or the payer before rendering services.
3
Submit appeal with provider designation proof
File a formal appeal including provider network participation records, referral documentation, or authorization confirmation numbers showing the provider was properly designated or authorized for these specific services.

Specialty Context

How CO-38 typically presents across different practice types.

Dental

Commonly seen when a member sees an out-of-network dentist or specialist without proper referral from their designated dental home provider in plans requiring coordination of care.

Medical

Frequent in HMO and managed care plans where members must receive services from their designated PCP or obtain referrals to specialists; also applies when urgent care or specialists bill without proper PCP authorization.

Behavioral Health

Common when behavioral health services are provided by a therapist or psychiatrist who is not the member's designated behavioral health provider or when services lack authorization from the designated care coordinator.

Individual Code References

View the standalone definition for each code in this combination.

CARC 38

Need to resolve this denial?

Get a complete resolution plan with appeal guidance for this exact combination in seconds.

Generate a free resolution plan & appeal letter →

Synthesized from official definitions — not from training data

Was this helpful?

← Back to Combo Lookup Browse All Codes →