ICD-10 Code D41.22 – Neoplasm of uncertain behavior of left ureter (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D41.22 – Neoplasm of uncertain behavior of left ureter
What it is
This code identifies a growth in the left ureter whose behavior is uncertain. Use it when pathology or clinical documentation shows the lesion is neither clearly benign nor clearly malignant.
Clinical signs
Clinical features vary; refer to documentation. Patients may have hematuria, flank pain, or an incidental ureteral mass on imaging, but these findings are not specific to this code.
When to use this code
Use D41.22 when the provider documents a neoplasm of uncertain behavior involving the left ureter and does not classify it as cancer or a benign lesion. It is appropriate after biopsy, imaging, or operative findings support an indeterminate diagnosis. Check documentation if the laterality is unclear.
Do not use for
Do not use this code for malignant neoplasm of the ureter, benign ureteral polyp, or inflammatory narrowing. If the record does not specify the left ureter, verify the site before coding.
Coding tip
Confirm both laterality and the exact wording of “uncertain behavior” in the provider record before assigning D41.22.