M21.1 is the ICD-10 code for Varus deformity, not elsewhere classified. It is a four-character subcategory of M21 (Other acquired deformities of limbs), the most specific level in the WHO edition. It belongs to the block M20–M25 (Other joint disorders) in Chapter XIII, Diseases of the musculoskeletal system and connective tissue.
- Code type
- Subcategory (4 characters)
- Chapter
- XIII · M00–M99
- Classification
- WHO ICD-10, 2019 version
What M21.1 excludes
Conditions that look similar but belong under another code.
M21.1 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
M21.1Varusdeformitet som ej klassificeras på annan plats
- M21.1CCubitus varus
- M21.1FCoxa vara
- M21.1GGenu varum
M21.1Ervervet varusdeformitet ikke klassifisert annet sted
DM211Varusdeformitet IKA
M21.1Muualla luokittamaton raajan varusepämuotoisuus
M21.1Varusdeformität, anderenorts nicht klassifiziert
M21.1Déformation en varus, non classée ailleurs
M21.1varusmisvorming, niet elders geclassificeerd
Listed through more specific codes:
- M21.10Varus deformity, not elsewhere classified, unspecified site
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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