ICD-10 Code D02.22 – Carcinoma in situ of left bronchus and lung (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D02.22 – Carcinoma in situ of left bronchus and lung
What it is
This code identifies a noninvasive malignant epithelial lesion in the left bronchus or left lung. The abnormal cells are confined to the surface lining and have not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. Diagnosis is usually based on pathology or endoscopic findings showing carcinoma in situ without stromal invasion.
When to use this code
Use D02.22 when the provider documents carcinoma in situ involving the left bronchus or left lung and confirms no invasion. Apply it for pathology reports, bronchoscopy findings, or specialist notes that clearly specify the left-sided site. If the record only says lung cancer without in situ detail, check documentation.
Do not use for
Do not use this code for invasive bronchial or lung cancer, metastatic disease, or benign lesions. If the site is not clearly documented as left bronchus or left lung, check documentation.
Coding tip
Confirm both the in situ nature and the left-sided site before assigning D02.22.