ICD-10 Code C44.229 – Squamous cell carcinoma of skin of left ear and external auricular canal (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C44.229 – Squamous cell carcinoma of skin of left ear and external auricular canal
What it is
This code identifies a malignant squamous cell carcinoma arising in the skin of the left ear or external auricular canal. Use it when documentation specifies this exact anatomic site.
Clinical signs
Typical findings include a persistent scaly, crusted, or ulcerated lesion that may bleed or fail to heal. Clinical features vary; refer to documentation and pathology when available.
When to use this code
Use C44.229 when the record clearly states squamous cell carcinoma of the skin involving the left ear or external auricular canal. It also fits when pathology confirms the diagnosis and the site is documented as left-sided. If the note only says “ear” without laterality or exact skin site, check documentation.
Do not use for
Do not use this code for basal cell carcinoma, melanoma, or benign skin lesions. Avoid it when the lesion is not documented as squamous cell carcinoma of the left ear or external auricular canal.
Coding tip
Verify both histology and laterality before assigning C44.229.