M21.171
ICD-10-CMThis code describes an inward angulation of the right ankle joint, where the distal part of the limb (foot) is turned inward towards the midline of the body. This deformity is not congenital and is not classified more specifically elsewhere in the ICD-10-CM system. It indicates a structural deviation from normal anatomical alignment.
Use this code when documentation specifies a varus deformity affecting the right ankle that is acquired or of unknown etiology, and not attributable to a more specific condition like a fracture malunion or congenital anomaly. Supporting documentation should clearly state "varus deformity of the right ankle" and confirm it is not congenital or secondary to another classified condition.
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