S56.309 — Unsp injury of extn/abdr musc/fasc/tend of thmb at forarm lv

S56.309 is the ICD-10-CM 2025 code for Unsp injury of extn/abdr musc/fasc/tend of thmb at forarm lv. Unspecified injury of extensor or abductor muscles, fascia and tendons of unspecified thumb at forearm level. ICD-10-CM is the medical coding system used by clinicians, hospitals and insurers worldwide to classify diseases and conditions in a standard way.

S56.309 is a category-level (umbrella) code rather than a billable specific code. For billing purposes, clinicians typically use a more specific sub-code under S56.309. Browse the sub-codes listed on this page.

S56.309 belongs to the chapter "Injury, poisoning and certain other consequences of external causes" (codes S00-T88). ICD-10-CM organises codes into 22 chapters by body system or condition type, which helps clinicians navigate related diagnoses.

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