M21.27 (Flexion deformity, ankle and toes) is an umbrella ICD-10-CM medical diagnosis code in the Diseases of the musculoskeletal system and connective tissue chapter. It identifies cases of flexion deformity, ankle and toes for clinical documentation, billing and epidemiological tracking.

ICD-10-CM · Category

M21.27 — Flexion deformity, ankle and toes

Chapter M00-M99: Diseases of the musculoskeletal system and connective tissue

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Sub-codes under M21.27

M21.271Flexion deformity, right ankle and toesM21.272Flexion deformity, left ankle and toesM21.279Flexion deformity, unspecified ankle and toes

Related diagnoses

M21.20Flexion deformity, unspecified siteM21.21Flexion deformity, shoulderM21.22Flexion deformity, elbowM21.23Flexion deformity, wristM21.24Flexion deformity, finger jointsM21.25Flexion deformity, hipM21.26Flexion deformity, knee

Common questions about M21.27 (Flexion deformity, ankle and toes)

What does ICD-10 code M21.27 mean?
M21.27 is the ICD-10-CM 2025 code for Flexion deformity, ankle and toes. 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 M21.27 a billable diagnosis code?
M21.27 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under M21.27. Browse the sub-codes listed on this page.
Which ICD-10 chapter does M21.27 belong to?
M21.27 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 Flexion deformity, ankle and toes?
For a plain-language explanation of Flexion deformity, ankle and toes, ask GoDavaii's Health AI - it explains medical conditions in 22+ Indian languages, free, with no signup. Tap "Ask GoDavaii AI about Flexion deformity, ankle and toes" 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 ↗