Kidney stones classification

The icd 10 code for kidney stones is found in the N00–N99 chapter. Urinary calculi are categorized under N20–N23. In the U.S. 2026 ICD-10-CM, N20.0 is the specific code for “Calculus of kidney.” It becomes effective on October 1, 2025. This code is critical as it connects a kidney stone diagnosis to claims, DRG grouping,…