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BETA v.3.0

2025 ICD-10-CM code N21.9

Calculus of lower urinary tract, unspecified.

Use this code when the documentation does not specify the precise location of the calculus within the lower urinary tract. If the location is known, use a more specific code (e.g., N21.0 for bladder calculus, N21.1 for urethral calculus).

Medical necessity is established by the presence of signs and symptoms of a lower urinary tract calculus, such as pain, hematuria, urinary obstruction, or recurrent urinary tract infections.

Diagnosis and management of urinary tract stones.

In simple words: Presence of stones in the lower urinary tract (bladder or urethra), but the exact location is not specified.

Calculus of lower urinary tract, unspecified. Excludes1: calculus of urinary tract NOS (N20.9)

Example 1: A patient presents with symptoms suggestive of a urinary tract stone, such as pain, difficulty urinating, and blood in the urine. Imaging studies confirm the presence of a stone, but its exact location within the lower urinary tract (bladder or urethra) is unclear., A patient with a history of recurrent urinary tract stones reports experiencing symptoms again. Urinalysis reveals microscopic hematuria, but imaging studies are inconclusive in pinpointing the exact location of a suspected stone in the lower urinary tract., During a routine cystoscopy, a small stone is visualized in the lower urinary tract, but it is dislodged during the procedure and its original location (bladder or urethra) cannot be definitively determined.

Symptoms, physical exam findings, imaging studies (e.g., CT scan, ultrasound), urinalysis.

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