N21.0 is the ICD-10 code for Calculus in bladder. It is a four-character subcategory of N21 (Calculus of lower urinary tract), the most specific level in the WHO edition. It belongs to the block N20–N23 (Urolithiasis) in Chapter XIV, Diseases of the genitourinary system.
- Code type
- Subcategory (4 characters)
- Chapter
- XIV · N00–N99
- Classification
- WHO ICD-10, 2019 version
What N21.0 includes
Conditions and terms that are coded here.
- Calculus in diverticulum of bladder
- Urinary bladder stone
What N21.0 excludes
Conditions that look similar but belong under another code.
- staghorn calculus N20.0
N21.0 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
N21.0Sten i urinblåsan
N21.0Blæresten
DN210Urinblæresten
- DN210ASten i urinblæredivertikel
N21.0Virtsarakon kivitauti
N21.0Stein in der Harnblase
N21.0Calcul de la vessie
N21.0blaassteen
N21.0Calculus in bladder
Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.
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