10ICD Code Hub

M65.4

Billable code

Radial styloid tenosynovitis [de Quervain]

The ICD-10 code for radial styloid tenosynovitis [de quervain] is M65.4.

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

Related codes in this category

ICD-9-CM equivalent

Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.

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Associated MS-DRGs

M65.4 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.