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ICD-10 diagnosis code

M23.9 Internal derangement of knee, unspecified

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M23.9 is the ICD-10 code for Internal derangement of knee, unspecified. It is a four-character subcategory of M23 (Internal derangement of knee), 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

M23.9 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

M23.9Förändring i knäled, ospecificerad

NorwayICD-10-NO

M23.9Uspesifisert kneleddlidelse

  • M23.90Uspesifisert kneleddlidelse i flere lokalisasjoner
  • M23.91Uspesifisert kneleddlidelse i fremre korsbånd
  • M23.92Uspesifisert kneleddlidelse i bakre korsbånd
  • M23.93Uspesifisert kneleddlidelse i mediale kollaterale ligament
  • M23.94Uspesifisert kneleddlidelse i laterale kollaterale ligament
  • M23.95Uspesifisert leddlidelse i bakre horn av lateral menisk
  • M23.96Uspesifisert leddlidelse i uspesifisert del av lateral menisk
  • M23.97Uspesifisert kneleddlidelse i leddkapsel
DenmarkICD-10-DK

DM239Knæledslidelse UNS

FinlandICD-10-FI

M23.9Määrittämätön polvinivelen sisäinen vika

GermanyICD-10-GM

M23.9Binnenschädigung des Kniegelenkes, nicht näher bezeichnet

  • M23.90Mehrere Lokalisationen
  • M23.91Vorderes Kreuzband oder Vorderhorn des Innenmeniskus
  • M23.92Hinteres Kreuzband oder Hinterhorn des Innenmeniskus
  • M23.93Innenband [Lig. collaterale tibiale] oder sonstiger und nicht näher bezeichneter Teil des Innenmeniskus
  • M23.94Außenband [Lig. collaterale fibulare] oder Vorderhorn des Außenmeniskus
  • M23.95Hinterhorn des Außenmeniskus
  • M23.96Sonstiger und nicht näher bezeichneter Teil des Außenmeniskus
  • M23.97Kapselband
  • and 1 more national subcodes
FranceICD-10-FR

M23.9Lésion interne du genou, sans précision

NetherlandsICD-10-NL

M23.9'dérangement interne' van knie, niet-gespecificeerd

United StatesICD-10-CM

Listed through more specific codes:

  • M23.90Unspecified internal derangement of unspecified knee
  • M23.91Unspecified internal derangement of right knee
  • M23.92Unspecified internal derangement of left knee

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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