ICD-10 Code D02 – Carcinoma in situ of middle ear and respiratory system (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D02 – Carcinoma in situ of middle ear and respiratory system
What it is
D02 identifies carcinoma in situ affecting the middle ear or respiratory system. You use it when the lesion is noninvasive and confined to the epithelium, with no documented spread into deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. Diagnosis is typically based on pathology or clinician documentation describing carcinoma in situ, dysplasia, or intraepithelial neoplasia in the specified site.
When to use this code
Use D02 when the provider documents carcinoma in situ of the middle ear or a respiratory structure and there is no evidence of invasive cancer. It may apply after biopsy, excision, or other evaluation confirming a noninvasive malignant lesion. Check the exact anatomic site in the record.
Do not use for
Do not use D02 for invasive malignant neoplasms, benign lesions, or uncertain masses without pathology support. If the documentation names a different site, code that specific site instead.
Coding tip
Verify the exact respiratory or middle ear location in the pathology or provider note before assigning D02.