Claim denials can be frustrating for healthcare providers, especially when they impact cash flow and delay payments. One of the most frequently encountered codes is the CO-96 Denial Code, which indicates “Non-Covered Charges.”
This Denial Code CO-96 is used when an insurance company rejects a claim because the services provided are not covered under the patient’s policy.
Understanding the CO-96 denial code, its causes, and how to prevent it is crucial for ensuring a healthy revenue cycle and minimizing payment delays.
CO 96 Denial Code Description
The CO-96 denial code is essentially a notification that the insurance carrier has determined that the claim includes services or charges that are not covered under the patient’s insurance policy. This could apply to various scenarios, such as:
- The service provided is not included in the patient’s benefit plan.
- The service was deemed experimental or investigational.
- The claim contains cosmetic or elective procedures that aren’t covered.
- The patient’s policy excludes the specific treatment.

Along with the CO-96 denial, insurance carriers often provide Remark Codes (RARC) or Claim Adjustment Reason Codes (CARC) to clarify the specific reason for the denial. These codes help you to identify what went wrong and how to correct the claim.
For example:
- RARC N130 – “Consult plan benefit documents for information about coverage.”
- CARC 204 – “Service not covered under the patient’s current benefit plan.”
- RARC M144 – “Pre-existing condition excluded from coverage.”
Common Causes of the CO-96 Denial Code
Several factors can trigger a CO-96 denial. Identifying these causes can help you understand how to resolve and prevent future denials.
- Non-Covered Services: The most common reason for this denial is that the service or procedure is not covered under the patient’s benefit plan. This often applies to cosmetic surgeries, alternative therapies, and some experimental treatments.
- Policy Limitations: Some insurance plans have specific limitations on the number of services covered. For example, physical therapy may be limited to a set number of visits per year.
- Pre-Existing Conditions: If a patient has a pre-existing condition that is excluded from their coverage, claims related to that condition will be denied with a CO-96 code.
- Incorrect Benefit Interpretation: Sometimes, a denial occurs due to a misunderstanding or misinterpretation of the patient’s benefit plan.
- Lack of Prior Authorization: Certain services require prior authorization. Failure to obtain it can result in a CO-96 denial.

Steps to Resolve a CO-96 Denial
Resolving a CO-96 denial requires a methodical approach. Here’s a step-by-step guide to help you correct and resubmit the claim:
- Review the Explanation of Benefits (EOB) or Remittance Advice (RA): Carefully examine the accompanying remark and adjustment codes to understand the reason for the denial.
- Check the Patient’s Insurance Policy: Verify the patient’s coverage and determine if the service is truly not covered. Sometimes the denial may be incorrect.
- Contact the Insurance Carrier: If you believe the service should be covered, contact the payer to clarify the denial. Be prepared to provide supporting documentation.
- Correct and Resubmit the Claim: If the denial was due to a billing error, correct the mistake and resubmit the claim with the required documentation.
- File an Appeal: If the service is indeed covered and the denial was issued in error, submit an appeal with a detailed explanation and all necessary proof of coverage.
Prevention Strategies for CO-96 Denials
Preventing CO-96 denials requires a proactive approach and strong processes in place. Here are some strategies to reduce the occurrence of this denial:
- Perform Comprehensive Eligibility Checks: Always verify the patient’s insurance benefits before providing services. This includes checking for coverage limitations, exclusions, and prior authorization requirements.
- Train Staff on Policy Interpretation: Ensure that your billing and front-desk staff are trained to understand insurance policies and identify potential non-covered services.
- Obtain Prior Authorization: For services that require prior authorization, make sure to obtain it before the service is provided. Keep a record of the authorization for future reference.
- Maintain Clear Communication with Patients: Inform patients about services that may not be covered and discuss potential out-of-pocket costs upfront. This transparency helps manage patient expectations and avoids surprises later.
- Leverage Technology: Use automated eligibility verification tools to get real-time updates on patients’ coverage and reduce human error.

The Role of Documentation in Preventing CO-96 Denials
Accurate and thorough documentation is essential in preventing and resolving CO-96 denials. When submitting a claim, make sure you:
- Provide Detailed Service Descriptions: Clearly describe the service provided and ensure it aligns with the patient’s diagnosis and treatment plan.
- Attach Necessary Documentation: Include any relevant documents, such as prior authorization approvals, medical necessity forms, or letters explaining the service.
- Double-check for Completeness: Ensure all required fields on the claim form are filled out correctly to avoid rejection.
How CO-96 Denials Impact the Revenue Cycle
CO-96 denials can significantly affect your practice’s financial health. When claims are rejected due to non-covered services, payments are delayed, and the practice’s accounts receivable increase. Here’s how it can impact your revenue cycle:
- Increased Administrative Costs: Additional time and resources are needed to investigate and resolve denials, increasing operational expenses.
- Cash Flow Disruption: Delayed payments can cause cash flow issues, affecting the practice’s ability to meet financial obligations.
- Reduced Patient Satisfaction: Patients may become frustrated if they are unexpectedly billed for services they assumed were covered.
- Higher Risk of Write-Offs: If the denial is not resolved promptly, the practice may be forced to write off the amount as a loss.

When to Appeal a CO-96 Denial
Not all CO-96 denials are final. In some cases, you may have valid grounds for an appeal. Consider appealing if:
- The Service is Covered: You have confirmed that the service is covered under the patient’s policy but was denied in error.
- Documentation Supports Medical Necessity: If the denial was due to a lack of documentation, submit additional supporting documents that prove the service was medically necessary.
- Authorization Was Obtained: If prior authorization was obtained but not properly recorded by the insurance carrier, provide proof and request a review.
When filing an appeal, include a detailed explanation, supporting documentation, and a copy of the denial notice. Be sure to follow the payer’s appeal process and meet any submission deadlines.
Conclusion
The CO-96 denial code can be challenging, but it can be resolved and prevented with the right approach. Understanding the causes, improving documentation, and strengthening eligibility verification help reduce CO-96 denials and support a healthier revenue cycle.
Denials are a normal part of medical billing, but they don’t have to disrupt operations. Staying proactive and refining internal processes leads to smoother claim submissions and fewer reimbursement delays. If denial codes like CO-96 continue to impact reimbursements, FC Billing provides denial management services to help providers resolve denials efficiently and reduce repeat issues.
