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ICD-10 diagnosis code

M21.9 Acquired deformity of limb, unspecified

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M21.9 is the ICD-10 code for Acquired deformity of limb, unspecified. 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

M21.9 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

M21.9Förvärvad extremitetsdeformitet, ospecificerad

NorwayICD-10-NO

M21.9Uspesifisert ervervet deformitet i ekstremitet

  • M21.90Uspesifisert ervervet deformitet i flere lokalisasjoner i ekstremitet
  • M21.91Uspesifisert ervervet deformitet i ekstremitet, i skulderregionen
  • M21.92Uspesifisert ervervet deformitet i ekstremitet, i albue
  • M21.93Uspesifisert ervervet deformitet i ekstremitet, i håndledd
  • M21.94Uspesifisert ervervet deformitet i ekstremitet, i ledd mellom knokler i hånd
  • M21.95Uspesifisert ervervet deformitet i ekstremitet, i hofteledd eller sakroiliakalledd
  • M21.96Uspesifisert ervervet deformitet i ekstremitet, i kneledd eller legg
  • M21.97Uspesifisert ervervet deformitet i ekstremitet, i ankel eller ledd mellom knokler i fot
  • and 2 more national subcodes
DenmarkICD-10-DK

DM219Erhvervet ekstremitetsdeformitet UNS

FinlandICD-10-FI

M21.9Määrittämätön hankinnainen raajaepämuotoisuus

GermanyICD-10-GM

M21.9Erworbene Deformität einer Extremität, nicht näher bezeichnet

FranceICD-10-FR

M21.9Déformation d'un membre, sans précision

NetherlandsICD-10-NL

M21.9verworven misvorming van extremiteit, niet-gespecificeerd

United StatesICD-10-CM

Listed through more specific codes:

  • M21.90Unspecified acquired deformity of unspecified limb

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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