ICD-10 Code D41.8 – Neoplasm of uncertain behavior of other specified urinary organs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D41.8 – Neoplasm of uncertain behavior of other specified urinary organs
What it is
This code identifies a tumor in a urinary organ that is not clearly benign or malignant. Use it when the record names an uncertain-behavior neoplasm in another specified urinary organ.
Clinical signs
Clinical features vary; refer to documentation. Findings may include a mass, abnormal imaging, or a lesion noted during evaluation, but the pathology or clinical impression does not confirm benign or malignant behavior.
When to use this code
Use D41.8 when the provider documents an uncertain-behavior neoplasm involving a specified urinary organ other than those listed elsewhere in the category. It is appropriate when the diagnosis is based on pathology, imaging, or operative findings, and the behavior remains uncertain. Check documentation if the organ or behavior is not clearly stated.
Do not use for
Do not use this code for clearly benign or malignant urinary tumors, or when the site is better captured by a more specific D41 code. If the record does not identify the organ or uncertain behavior, check documentation.
Coding tip
Match the exact organ name in the note to the tabular list before assigning D41.8.