Ca in situ skin of left ear and external auricular canal

Carcinoma in situ of skin of left ear and external auricular canal

📋Clinical Description

This code signifies the presence of non-invasive squamous cell carcinoma or melanoma confined to the epidermis (carcinoma in situ) affecting the skin of the left ear, including the external auditory canal. It indicates that the malignant cells have not penetrated the basement membrane.

🎯When to Use

Apply this code when documentation specifies carcinoma in situ located on the left ear or within the external auricular canal. This diagnosis is typically confirmed by biopsy results showing intraepidermal malignancy without stromal invasion.

💡Coding Tips

Ensure the laterality (left ear) is clearly documented.
Distinguish from invasive squamous cell carcinoma (C44.221) or melanoma (C43.22) of the left ear.
Confirm the "in situ" status; if invasion is present, a malignant neoplasm code should be used instead.

AI-generated reference — verify against official guidelines

Code Hierarchy

▲D04.2Ca in situ skin of ear and external auricular canal

D04.22(current)

Crosswalks

232.2ApproxICD-9

Same Category

D04Carcinoma in situ of skin D04.0Carcinoma in situ of skin of lip D04.1Carcinoma in situ of skin of eyelid, including canthus D04.10Carcinoma in situ of skin of unsp eyelid, including canthus D04.11Carcinoma in situ of skin of right eyelid, including canthus