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ALL MEDICAL CODES IN CATEGORY N20-N23 Urolithiasis

2025 ICD-10-CM code N21

Calculus of the lower urinary tract, including bladder and urethra.

2025 ICD-10-CM code N20.9

Urinary calculus, unspecified; this code is used when the location of the urinary stone (calculus) is unknown.

2025 ICD-10-CM code N20.1

Calculus of ureter; presence of a stone in the ureter.