S42.436P
ICD-10-CMNondisplaced fracture (avulsion) of lateral epicondyle of unspecified humerus, subsequent encounter for fracture with malunion
This code describes a previously treated avulsion fracture of the lateral epicondyle of the humerus, which is now healing incorrectly, resulting in a malunion. An avulsion fracture occurs when a tendon or ligament pulls a small piece of bone away from the main bone. In this case, the fracture is not displaced, meaning the bone fragments are still in their anatomical position relative to each other, but the healing process has gone awry.
This code is used for follow-up encounters where a patient is being managed for a malunited avulsion fracture of the lateral epicondyle, regardless of which arm is affected. This includes situations where the malunion is being monitored, or when further intervention (e.g., surgical correction) is being planned or performed due to the improper healing.
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