Quick Explanation
This denial code indicates that the insurance payer processed the claim based on a contracted or negotiated fee schedule that is no longer valid or has expired for the date of service. It typically arises when a contract renewal is pending, credentialing has lapsed, or the payer has failed to update their system with the latest contract terms.
Common Causes for CO-146
Denials with code CO-146 typically happen for the following specific reasons:
- The provider-payer contract expired prior to the date of service and a new agreement was not executed or loaded into the system.
- A delay in the payer's internal database update following a successful contract renegotiation or renewal.
- A lapse in the provider's credentialing status, which caused the contract rate to revert to an expired or out-of-network status.
- The claim was submitted under a Tax ID (TIN) or NPI that is not linked to the current, active contracted rate agreement.
How to Prevent CO-146 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Maintain a contract lifecycle management calendar to initiate renegotiations at least 90 to 120 days prior to contract expiration.
- Regularly audit payer-specific fee schedules in the practice management system to ensure active dates match contract terms.
- Promptly submit credentialing revalidation applications to prevent contract suspensions or expirations.
- Verify that the billing NPI, rendering NPI, and Tax ID are properly aligned with the active managed care contract before submission.
Appeal Letter Template for CO-146
If you believe this claim was denied incorrectly, you can use the following template to submit an appeal.
[Your Practice Header]
[Date]
[Payer Name]
[Appeals Department Address]
RE: Appeal for Claim [Claim Number]
Patient: [Patient Name]
ID: [Patient ID]
Date of Service: [Date]
Denial Code: CO-146 - Provider contracted/negotiated rate expired
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code CO-146: "Provider contracted/negotiated rate expired".
We are appealing the denial of this claim associated with adjustment code CO-146, stating that the contracted rate has expired. Our records confirm that a valid, fully executed participating provider contract was active and in effect on the date of service. In accordance with standard healthcare contracting rules and CMS guidelines regarding participating provider agreements, payers are contractually obligated to adjudicate claims utilizing the negotiated fee schedule active at the time the services were rendered. The contract renewal was finalized and effective as of the date of service; therefore, we request that you update your provider enrollment database and reprocess this claim for immediate payment under the correct, active negotiated rate.
Attached please find:
1. A copy of the original claim.
2. The relevant medical records supporting the service.
3. [Any other supporting documents].
We respectfully request that you reprocess this claim for payment.
Sincerely,
[Your Name]
[Title]
[Practice Name]
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