ICD-10 Code D09.19 – Carcinoma in situ of other urinary organs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D09.19 – Carcinoma in situ of other urinary organs
What it is
This code identifies carcinoma in situ, a noninvasive malignant change, in urinary organs other than the bladder, ureter, renal pelvis, or urethra. The lesion is confined to the epithelium and has not invaded deeper tissue.
Clinical signs
Clinical features vary; refer to documentation. Diagnosis is usually based on pathology showing carcinoma in situ in a specified other urinary organ, with no evidence of stromal or deeper invasion.
When to use this code
Use D09.19 when the record clearly states carcinoma in situ involving another urinary organ and does not name a more specific site covered by a different code. You may see it on biopsy, cystoscopic, or surgical pathology reports. Code it only when the provider documents the in situ diagnosis.
Do not use for
Do not use this code for invasive urinary tract cancer, uncertain behavior, or benign lesions. If the organ is bladder, ureter, renal pelvis, or urethra, check documentation for the correct site-specific code.
Coding tip
Verify the exact urinary organ and confirm “in situ” wording before assigning D09.19.