ICD-10-CM > C00-D49 > D37-D48 > D41 > D41.1 D41.1 Neoplasm of uncertain behavior of renal pelvis Non-Billable/Non-Specific Codes D41.10Neoplasm of uncertain behavior of unspecified renal pelvisD41.11Neoplasm of uncertain behavior of right renal pelvisD41.12Neoplasm of uncertain behavior of left renal pelvis