S42.346K
ICD-10-CMNondisplaced spiral fracture of shaft of humerus, unspecified arm, subsequent encounter for fracture with nonunion
This code signifies a spiral fracture of the humeral shaft that is not displaced, meaning the bone fragments are still in their normal anatomical alignment. The "subsequent encounter" indicates the patient is receiving follow-up care for this fracture, and "nonunion" specifies that the fracture has failed to heal completely after an expected period.
Use this code for a patient presenting for ongoing management of a previously diagnosed nondisplaced spiral humerus shaft fracture that has not united. This would apply to scenarios such as follow-up appointments for casting, bracing, physical therapy, or surgical planning related to the nonunion.
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