ICD-10 Code C67.8 – Malignant neoplasm of overlapping sites of bladder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C67.8 – Malignant neoplasm of overlapping sites of bladder
What it is
C67.8 identifies a malignant tumor of the bladder that involves overlapping sites, meaning the cancer spans more than one bladder region and cannot be assigned to a single specific subsite.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented findings include hematuria, urinary frequency, urgency, dysuria, or pelvic discomfort, along with cystoscopic or imaging evidence of bladder malignancy.
When to use this code
Use C67.8 when the provider documents bladder cancer involving overlapping areas of the bladder and does not identify one dominant site. It also applies when the record clearly states “overlapping sites” or equivalent wording. If the site is described more specifically, code the documented subsite instead.
Do not use for
Do not use this code for benign bladder lesions, non-neoplastic urinary symptoms, or cancer limited to a single bladder subsite. Check documentation if the report does not clearly indicate overlapping involvement.
Coding tip
Code the most specific bladder site documented, and use C67.8 only when overlapping involvement is explicitly stated or clearly supported.