ICD-10 Code D09.0 – Carcinoma in situ of bladder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D09.0 – Carcinoma in situ of bladder
What it is
D09.0 identifies a noninvasive malignant lesion of the bladder lining. The abnormal cells remain in the urothelium and have not invaded deeper bladder tissue.
Clinical signs
Findings often include abnormal cystoscopic appearance or pathology confirming carcinoma in situ. Hematuria or irritative urinary symptoms may occur, but clinical features vary; refer to documentation.
When to use this code
Use D09.0 when the provider documents carcinoma in situ of the bladder, including pathology-confirmed noninvasive disease. Code it when the record clearly distinguishes in situ bladder cancer from invasive bladder malignancy.
If documentation is incomplete, verify whether the lesion is in situ, invasive, or uncertain. Check documentation when the site is described only as bladder cancer without histologic detail.
Do not use for
Do not use D09.0 for invasive bladder cancer, benign bladder lesions, or nonspecific hematuria. If the diagnosis is uncertain or not confirmed, check documentation.
Coding tip
Confirm the pathology wording and bladder site before assigning D09.0.