ICD-10-CM · Category
M21.3 — Wrist or foot drop (acquired)
Chapter M00-M99: Diseases of the musculoskeletal system and connective tissue
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Related diagnoses
M21.0Valgus deformity, not elsewhere classifiedM21.1Varus deformity, not elsewhere classifiedM21.2Flexion deformityM21.4Flat foot [pes planus] (acquired)M21.5Acquired clawhand, clubhand, clawfoot and clubfootM21.6Other acquired deformities of footM21.7Unequal limb length (acquired)M21.8Other specified acquired deformities of limbsM21.9Unspecified acquired deformity of limb and hand
Common questions about M21.3 (Wrist or foot drop (acquired))
What does ICD-10 code M21.3 mean?
M21.3 is the ICD-10-CM 2025 code for Wrist or foot drop (acquired). ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.
Is M21.3 a billable diagnosis code?
M21.3 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under M21.3. Browse the sub-codes listed on this page.
Which ICD-10 chapter does M21.3 belong to?
M21.3 belongs to the chapter "Diseases of the musculoskeletal system and connective tissue" (codes M00-M99). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.
Where can I get plain-language information about Wrist or foot drop (acquired)?
For a plain-language explanation of Wrist or foot drop (acquired), ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Wrist or foot drop (acquired)" above to get a personalised answer.
Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗