Calculus of kidney with calculus of ureter

This code signifies the presence of kidney stones (renal calculi) concurrently with stones located in the ureter. It indicates a dual lithiasis affecting both the kidney and the tube connecting the kidney to the bladder.

Apply this code when documentation clearly states the presence of calculi in both the kidney and the ureter. This is appropriate for patients presenting with symptoms such as flank pain, hematuria, or obstructive uropathy, where imaging studies confirm stones in both locations.

• Ensure documentation specifies calculi in both the kidney and the ureter; do not use if only one location is mentioned.
• Consider sequencing this code as the primary diagnosis if it is the main reason for the encounter.
• Distinguish from codes describing calculi in the kidney only (N20.0) or ureter only (N20.1).