M65.4 is the ICD-10 code for Radial styloid tenosynovitis [de Quervain]. It is a four-character subcategory of M65 (Synovitis and tenosynovitis), the most specific level in the WHO edition. It belongs to the block M65–M68 (Disorders of synovium and tendon) 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
M65.4 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
M65.4Radial styloid tenosynovitt
DM654Tenovaginitis styloideae radii
M65.4Värttinäluun puikkolisäkkeen alueen jännetuppitulehdus (de Quervain)
M65.4Tendovaginitis stenosans [de Quervain]
M65.4Ténosynovite chronique sténosante du pouce [de Quervain]
M65.4tendovaginitis ter hoogte van 'processus styloideus radii' [De Quervain]
M65.4Radial styloid tenosynovitis [de Quervain]
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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