S42.426B
ICD-10-CMNondisplaced comminuted supracondylar fracture without intercondylar fracture of unspecified humerus, initial encounter for open fracture
This code describes a specific type of humerus fracture where the bone is broken into multiple pieces (comminuted) above the elbow joint (supracondylar), but the fragments are still in their normal anatomical position (nondisplaced). Importantly, the fracture does not extend into the elbow joint itself (without intercondylar fracture). This particular code is designated for the initial treatment of an open fracture, meaning the skin was broken at the time of injury.
This code is appropriate for the initial encounter of a patient presenting with a newly diagnosed, nondisplaced, comminuted supracondylar fracture of the humerus, where the fracture is open. It would be used by emergency department physicians, orthopedic surgeons, or other providers managing the acute injury. Documentation must clearly specify the open nature of the fracture and the absence of intercondylar involvement.
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