CPT® Code 24400

An osteotomy of the humerus involves the surgical cutting and realignment of the humeral bone, which is located in the upper arm. This procedure is typically indicated for correcting deformities such as rotational misalignments that may arise from conditions like malunion, where a bone heals improperly after a fracture, or osteogenesis imperfecta, a genetic disorder characterized by fragile bones. The specific type of osteotomy performed—whether it be transverse, wedge, sliding, right or left angle, V-osteotomy, or Z-osteotomy—depends on the nature and location of the deformity being addressed. The surgical approach begins with an incision made over the affected area of the upper arm, allowing the surgeon to dissect through the soft tissues to expose the humerus. Once the bone is accessible, the periosteum, which is the connective tissue surrounding the bone, is elevated to facilitate the procedure. The surgeon then utilizes instruments such as a drill, saw, or osteotome to create a precise cut in the bone according to the predetermined configuration necessary for correction. After the osteotomy is performed, internal fixation devices such as pins, screws, or plates may be applied to stabilize the bone fragments and maintain their anatomical alignment. In some cases, an external fixation device may also be utilized. The procedure described by CPT® Code 24400 specifically refers to a single osteotomy of the humerus, which may or may not involve the use of internal fixation to ensure proper healing and alignment of the bone post-surgery.