Tuberculosis of kidney and ureter

This code signifies a bacterial infection of the renal parenchyma and/or the ureters caused by Mycobacterium tuberculosis. It represents a manifestation of extrapulmonary tuberculosis affecting the urinary tract, potentially leading to renal damage, strictures, and impaired kidney function.

Assign this code when documentation confirms a diagnosis of tuberculosis specifically affecting the kidney and/or ureter. This typically involves positive cultures for M. tuberculosis from urine or renal tissue, characteristic imaging findings (e.g., calcifications, strictures), and/or histological evidence.

• Ensure documentation clearly specifies kidney and/or ureter involvement; do not use for general genitourinary tuberculosis without this specificity.
• Code also for the underlying active tuberculosis (A15.-) if present and not already captured.
• Consider additional codes for any associated complications, such as hydronephrosis (N13.-) or renal failure (N18.-).