ICD-10 Code C44.529 – Squamous cell carcinoma of skin of other part of trunk (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.529 – Squamous cell carcinoma of skin of other part of trunk
What it is
This code identifies a malignant squamous cell carcinoma arising in the skin of the trunk, excluding more specific trunk sites. Use it when the documentation states the lesion is on another part of the trunk and not on the breast, anus, or genital skin.
Clinical signs
Typical findings include a persistent scaly or crusted skin lesion, a nonhealing ulcer, or a firm enlarging nodule. Clinical features vary; refer to documentation for the exact site and pathology confirmation.
When to use this code
Use C44.529 when the provider documents squamous cell carcinoma of the skin on an unspecified or other named area of the trunk. It fits confirmed skin cancer of the trunk when a more specific anatomic code is not available. Check documentation if the lesion involves adjacent sites or multiple skin areas.
Do not use for
Do not use this code for squamous cell carcinoma of the breast, anus, or genital skin, which have separate codes. Do not use it for benign skin lesions or for lesions on non-trunk sites.
Coding tip
Match the documented tumor site exactly; if the trunk location is more specific, code that site instead of this “other part” category.