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ICD-10 diagnosis code

M18.5 Other secondary arthrosis of first carpometacarpal joint

This page in Swedish

M18.5 is the ICD-10 code for Other secondary arthrosis of first carpometacarpal joint. It is a four-character subcategory of M18 (Arthrosis of first carpometacarpal joint), the most specific level in the WHO edition. It belongs to the block M15–M19 (Arthrosis) 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 M18.5 includes

Conditions and terms that are coded here.

  • Secondary arthrosis of first carpometacarpal joint:
    • NOS
    • unilateral

M18.5 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

M18.5Annan sekundär artros i första karpometakarpalleden, ensidig eller UNS

NorwayICD-10-NO

M18.5Annen sekundær artrose i første karpometakarpalledd, uten opplysning om bilateral manifestasjon

DenmarkICD-10-DK

DM185Anden form for sekundær enkeltsidig artrose i tommelfingers rodled

  • DM185ASekundær artrose i tommelfingers rodled UNS
FinlandICD-10-FI

M18.5Muu peukalon kämmennivelen (CMC) sekundaarinen nivelrikko

GermanyICD-10-GM

M18.5Sonstige sekundäre Rhizarthrose

FranceICD-10-FR

M18.5Autres arthroses secondaires de la première articulation carpométacarpienne

NetherlandsICD-10-NL

M18.5secundaire artrose van eerste carpometacarpale-gewricht, overig

United StatesICD-10-CM

Listed through more specific codes:

  • M18.50Other unilateral secondary osteoarthritis of first carpometacarpal joint, unspecified hand
  • M18.51Other unilateral secondary osteoarthritis of first carpometacarpal joint, right hand
  • M18.52Other unilateral secondary osteoarthritis of first carpometacarpal joint, left hand

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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