ICD-10-CM · Billable Code
M21.921 — Unspecified acquired deformity of right upper arm
Chapter M00-M99: Diseases of the musculoskeletal system and connective tissue
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Common questions about M21.921 (Unspecified acquired deformity of right upper arm)
What does ICD-10 code M21.921 mean?
M21.921 is the ICD-10-CM 2025 code for Unspecified acquired deformity of right upper arm. 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 M21.921 a billable diagnosis code?
Yes, M21.921 is a billable / specific ICD-10-CM code, meaning it can be used by clinicians and hospitals as a primary or secondary diagnosis on claims and electronic health records.
Which ICD-10 chapter does M21.921 belong to?
M21.921 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 Unspecified acquired deformity of right upper arm?
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Source: ICD-10-CM 2025 (Centers for Medicare & Medicaid Services, public domain). Codes valid from October 1, 2024. CMS source ↗