N20 is the ICD-10 code for Calculus of kidney and ureter. It is a three-character category divided into 4 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block N20–N23 (Urolithiasis) in Chapter XIV, Diseases of the genitourinary system.
- Code type
- Category (3 characters)
- Chapter
- XIV · N00–N99
- Classification
- WHO ICD-10, 2019 version
What N20 includes
Conditions and terms that are coded here.
- calculous pyelonephritis
What N20 excludes
Conditions that look similar but belong under another code.
- with hydronephrosis N13.2
Subcodes of N20
N20 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DN20Sten i nyre og urinleder
N20Munuaisen ja/tai virtsanjohtimen kivitauti
N20Nieren- und Ureterstein
N20Calcul du rein et de l'uretère
N20nier- en uretersteen
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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