ICD-10 Code D41.20 – Neoplasm of uncertain behavior of unspecified ureter (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code D41.20 – Neoplasm of uncertain behavior of unspecified ureter
What it is
This code identifies a ureteral tumor whose behavior cannot be determined as benign or malignant, and the ureter side is not specified. Use it when the record documents an uncertain neoplasm of the ureter without laterality.
Clinical signs
Clinical features vary; refer to documentation. Patients may have urinary obstruction, hematuria, flank pain, or imaging findings showing a ureteral mass, but these findings alone do not establish behavior.
When to use this code
Use D41.20 when the provider documents a neoplasm of uncertain behavior in the ureter and does not specify right or left. It also fits cases where pathology or imaging suggests an indeterminate lesion and the chart supports uncertain behavior. If laterality is documented, select the more specific code.
Do not use for
Do not use this code for confirmed malignant neoplasms, benign tumors, or lesions in a different urinary tract site. Check documentation if the ureter side or tumor behavior is stated elsewhere.
Coding tip
Confirm both behavior and laterality in the report before assigning D41.20.