ICD-10 Code C67.0 – Malignant neoplasm of trigone of bladder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code C67.0 – Malignant neoplasm of trigone of bladder
What it is
This code identifies a malignant tumor located in the trigone of the bladder, the triangular area at the bladder base between the ureteral openings and the internal urethral orifice. Use it when documentation specifies this exact bladder site.
Clinical signs
Common findings may include hematuria, urinary frequency, urgency, dysuria, or recurrent urinary symptoms. Clinical features vary; refer to documentation and pathology or imaging when available.
When to use this code
Use C67.0 when the provider documents primary bladder cancer arising in the trigone. It is also appropriate when the pathology report or operative note clearly localizes the malignancy to the trigone. If the site is described only as bladder cancer without location, check documentation.
Do not use for
Do not use this code for nonmalignant bladder lesions, metastatic disease to the bladder, or cancers documented in another bladder site. If the trigone is not confirmed, check documentation before coding.
Coding tip
Code the most specific bladder site documented, and query when the record says only “bladder cancer” or gives conflicting locations.