ICD-10 Code D41 – Neoplasm of uncertain behavior of urinary organs (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D41 – Neoplasm of uncertain behavior of urinary organs
What it is
D41 identifies a neoplasm in a urinary organ whose behavior is uncertain, meaning the pathology does not clearly show benign or malignant features. Use it for urinary tract tumors when the final biologic behavior is not established.
Clinical signs
Clinical features vary; refer to documentation. Patients may present with hematuria, urinary obstruction, pain, or an imaging or cystoscopic finding of a mass, but the diagnosis depends on documented uncertainty in behavior.
When to use this code
Use D41 when the provider documents a neoplasm of the kidney, renal pelvis, ureter, bladder, or other urinary organ and the lesion is neither clearly benign nor malignant. It also fits when pathology or imaging supports a tumor, but the final behavior remains uncertain. Check documentation for the exact organ and site.
Do not use for
Do not use D41 for clearly benign urinary tumors, malignant neoplasms, or inflammatory masses. If the record identifies a specific benign or malignant diagnosis, code that condition instead.
Coding tip
Capture the exact urinary organ and any documented behavior wording, because D41 is site-specific and should match the provider’s final assessment.