Neoplasm of uncertain behavior of urinary organs (D41)
The ICD-10 code section D41 is used to classify neoplasms of uncertain behavior specifically affecting urinary organs. These codes apply when it is unclear whether the growth is benign or malignant, covering various parts such as the kidneys, renal pelvis, ureters, urethra, bladder, and other specified urinary organs.
This range includes detailed subcodes like D41.0 for uncertain kidney neoplasms; sometimes referred to as mesoblastic nephroma; and distinguishes between right (D41.01) and left kidneys (D41.02). It similarly covers neoplasms of the renal pelvis (D41.1), ureters (D41.2), urethra (D41.3), and bladder (D41.4), noting synonyms such as neoplasm of the urinary bladder wall or trigone area. For unspecified urinary sites, D41.9 captures uncertain behavior neoplasms broadly. These codes help medical coders find the precise ICD-10 code for conditions where urinary tumors cannot yet be definitively classified as benign or malignant, improving documentation and treatment planning.
Neoplasms (C00–D49)
Neoplasms of uncertain behavior, polycythemia vera and myelodysplastic syndromes (D37-D48)
D41 Neoplasm of uncertain behavior of urinary organs
D41.0 Neoplasm of uncertain behavior of kidney
- D41.00 Neoplasm of uncertain behavior of unspecified kidney
- D41.01 Neoplasm of uncertain behavior of right kidney
- D41.02 Neoplasm of uncertain behavior of left kidney
D41.1 Neoplasm of uncertain behavior of renal pelvis
- D41.10 Neoplasm of uncertain behavior of unspecified renal pelvis
- D41.11 Neoplasm of uncertain behavior of right renal pelvis
- D41.12 Neoplasm of uncertain behavior of left renal pelvis
D41.2 Neoplasm of uncertain behavior of ureter
- D41.20 Neoplasm of uncertain behavior of unspecified ureter
- D41.21 Neoplasm of uncertain behavior of right ureter
- D41.22 Neoplasm of uncertain behavior of left ureter
- D41.3 Neoplasm of uncertain behavior of urethra
- D41.4 Neoplasm of uncertain behavior of bladder
- D41.8 Neoplasm of uncertain behavior of other specified urinary organs
- D41.9 Neoplasm of uncertain behavior of unspecified urinary organ
Neoplasm of uncertain behavior of urinary organs (D41)
Clinical Terms
The following clinical terms provide additional context, helping users better understand the clinical background and common associations for each diagnosis listed in this section. Including related terms alongside ICD-10-CM codes supports coders, billers, and healthcare professionals in improving accuracy, enhancing documentation, and facilitating research or patient education.
Urachus
An embryonic structure originating from the ALLANTOIS. It is a canal connecting the fetal URINARY BLADDER and the UMBILICUS. It is normally converted into a fibrous cord postnatally. When the canal fails to be filled and remains open (patent urachus), urine leaks through the umbilicus.
