ICD-10 Code C79.11 – Secondary malignant neoplasm of bladder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C79.11 – Secondary malignant neoplasm of bladder
What it is
This code identifies metastatic cancer involving the bladder, meaning a malignant tumor has spread to the bladder from another primary site. It does not describe a primary bladder cancer.
Clinical signs
Clinical features vary; refer to documentation. Common findings may include hematuria, urinary frequency, urgency, dysuria, or bladder mass seen on imaging or cystoscopy.
When to use this code
Use C79.11 when the record clearly states secondary malignant neoplasm of the bladder, bladder metastasis, or metastatic involvement of the bladder. Code the documented primary cancer separately when applicable. If the source site is unclear, check documentation before assigning this code.
Do not use for
Do not use this code for primary bladder cancer or for benign bladder lesions. It is also incorrect when the chart only mentions urinary symptoms without confirmed metastatic disease.
Coding tip
Look for explicit provider documentation of metastatic spread to the bladder; do not infer it from cancer history alone.