S42.342K
ICD-10-CMDisplaced spiral fracture of shaft of humerus, left arm, subsequent encounter for fracture with nonunion
This code signifies a specific type of humerus fracture: a displaced spiral fracture located in the shaft of the left humerus. The "K" seventh character indicates that this is a subsequent encounter for the fracture, and a nonunion of the bone is present, meaning the fracture has failed to heal after an expected period.
Use this code when documenting follow-up care for a patient with a previously diagnosed left humeral shaft spiral fracture that is now complicated by nonunion. This applies to situations where the patient is receiving ongoing treatment for the nonunion, such as surgical intervention, bone stimulation, or cast changes, after the initial active treatment phase.
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