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ICD-10 diagnosis code

M13.1 Monoarthritis, not elsewhere classified

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M13.1 is the ICD-10 code for Monoarthritis, not elsewhere classified. It is a four-character subcategory of M13 (Other arthritis), the most specific level in the WHO edition. It belongs to the block M05–M14 (Inflammatory polyarthropathies) 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

M13.1 in national editions

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

SwedenICD-10-SE

M13.1Monoartrit som ej klassificeras på annan plats

NorwayICD-10-NO

M13.1Monoartritt ikke klassifisert annet sted

  • M13.10Monoartritt ikke klassifisert annet sted, i flere lokalisasjoner
  • M13.11Monoartritt ikke klassifisert annet sted, i skulderregionen
  • M13.12Monoartritt ikke klassifisert annet sted, i albue
  • M13.13Monoartritt ikke klassifisert annet sted, i håndledd
  • M13.14Monoartritt ikke klassifisert annet sted, i ledd mellom knokler i hånd
  • M13.15Monoartritt ikke klassifisert annet sted, i hofteledd eller sakroiliakalledd
  • M13.16Monoartritt ikke klassifisert annet sted, i kneledd
  • M13.17Monoartritt ikke klassifisert annet sted, i ankel eller ledd mellom knokler i fot
  • and 2 more national subcodes
DenmarkICD-10-DK

DM131Monoartritis IKA

  • DM131ACoxitis simplex
FinlandICD-10-FI

M13.1Muualla luokittamaton yksiniveltulehdus

GermanyICD-10-GM

M13.1Monarthritis, anderenorts nicht klassifiziert

FranceICD-10-FR

M13.1Monoarthrite, non classée ailleurs

NetherlandsICD-10-NL

M13.1monartritis, niet elders geclassificeerd

United StatesICD-10-CM

Listed through more specific codes:

  • M13.10Monoarthritis, 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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