Quick Explanation
Denial code 45 represents a contractual adjustment indicating that the billed charge for a service exceeds the maximum allowable amount set by the payer's fee schedule or the provider's contract. For in-network providers, this represents the standard write-off amount that cannot be billed to the patient. However, if applied incorrectly, it can indicate that the payer used an outdated fee schedule or misapplied network contract terms.
Common Causes for 45
Denials with code 45 typically happen for the following specific reasons:
- The provider billed their standard chargemaster rate, and the payer adjusted the claim down to the contractually agreed-upon rate.
- The insurance payer applied an incorrect or outdated fee schedule year during claim adjudication.
- The payer erroneously applied an in-network discount to a non-participating or out-of-network provider's claim.
- Multiple surgical procedures were billed, and the payer misapplied multiple procedure payment reduction (MPPR) rules beyond contracted limits.
How to Prevent 45 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Regularly update and load current payer-specific contracted fee schedules into the Practice Management system to accurately estimate write-offs.
- Audit payer remittance advices monthly to ensure the allowed amounts match the active contract rate sheets.
- Verify provider credentialing and network participation status prior to billing to ensure appropriate out-of-network billing rules are applied when applicable.
- Utilize automated contract-matching software to flag any deviations between expected contracted rates and the actual allowed amounts posted by payers.
Appeal Letter Template for 45
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: 45 - Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code 45: "Charge exceeds fee schedule/maximum allowable or contracted/legislated fee arrangement".
We are writing to appeal the reimbursement amount calculated for this claim, as the applied contractual reduction under code 45 deviates from our active participation agreement. Under standard contract guidelines and CMS reimbursement principles, claims must be adjudicated according to the fee schedule active on the specific date of service. Our records indicate that the allowed amount applied to CPT code [Insert CPT Code] is lower than the contractually agreed rate of [Insert Expected Rate]. We request that you review the contract loading parameters for NPI [Insert NPI] and reprocess this claim to remit the remaining contractually obligated balance.
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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