ICD-10 Code C44.52 – Squamous cell carcinoma of skin of trunk (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.52 – Squamous cell carcinoma of skin of trunk
What it is
This code identifies a malignant squamous cell tumor arising from the skin of the trunk, such as the chest, back, or abdomen. Use it when documentation specifies the trunk as the primary skin site.
Clinical signs
Typical findings include a firm, scaly, crusted, or ulcerated skin lesion that may enlarge or bleed. Clinical features vary; refer to documentation.
When to use this code
Use C44.52 when the provider documents squamous cell carcinoma of the skin and clearly identifies the trunk as the location. It also fits pathology-confirmed lesions on the trunk when no more specific site is documented. Check documentation if the lesion site is unclear or if another skin area is named.
Do not use for
Do not use this code for squamous cell carcinoma of the skin on the face, scalp, limbs, or other sites. Do not use it when the record only says “skin cancer” without confirming squamous cell carcinoma and trunk location.
Coding tip
Verify both histology and anatomic site in the pathology or operative note before assigning C44.52.