Quick Explanation
Denial code D5 indicates that the payer has determined the performed Mohs micrographic surgery did not meet established clinical criteria or medical necessity guidelines for the specific lesion. Payers typically utilize the American Academy of Dermatology (AAD) Appropriate Use Criteria (AUC) or Local Coverage Determinations (LCDs) to evaluate if the tumor's pathology, anatomical location, and patient risk factors justify this specialized technique instead of standard excision.
Common Causes for D5
Denials with code D5 typically happen for the following specific reasons:
- The lesion is located in a low-risk anatomical area (such as the trunk or extremities) and does not exhibit aggressive histopathologic features.
- The pathology report fails to specify an aggressive subtype of basal cell or squamous cell carcinoma necessary to justify the procedure.
- The procedure was performed on a benign or pre-malignant lesion where Mohs micrographic surgery is not medically indicated.
- Inadequate documentation in the medical record failing to outline why standard surgical excision or less invasive treatments were clinically inappropriate.
How to Prevent D5 Denials
To avoid receiving this denial in the future, implement these specific checks:
- Cross-reference all scheduled Mohs procedures against the AAD Appropriate Use Criteria (AUC) and Medicare LCD guidelines prior to surgery.
- Ensure precise ICD-10-CM coding that accurately reflects the exact anatomical location and high-risk pathology of the lesion.
- Maintain detailed preoperative documentation that clearly outlines the tumor characteristics, size, borders, and prior treatment history.
- Implement automated billing edits that flag Mohs CPT codes (e.g., 17311) when billed with low-risk diagnosis codes.
Appeal Letter Template for D5
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: D5 - Mohs surgery not appropriate
Dear Appeals Department,
I am writing to appeal the denial of the above-referenced claim, which was denied with code D5: "Mohs surgery not appropriate".
We are appealing the denial of the Mohs micrographic surgery (CPT 17311) for this patient. According to the AMA CPT guidelines and CMS Local Coverage Determination (LCD) standards, Mohs micrographic surgery is highly appropriate and medically necessary for lesions located in high-risk anatomic zones or those exhibiting aggressive histopathologic features. The submitted clinical documentation and pathology report clearly indicate that the patient presented with an aggressive subtype of skin cancer in a critical anatomical area where maximum tissue preservation is essential to avoid functional impairment. Because this clinical presentation aligns directly with the 'Appropriate' classification of the AAD/ACMS Appropriate Use Criteria (AUC), we respectfully request that this denial be overturned and the claim be processed for full payment.
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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