CPT® Code 27303

The procedure described by CPT® Code 27303 involves a deep incision that opens the bone cortex of the femur or knee, specifically targeting conditions such as osteomyelitis or a bone abscess. Osteomyelitis refers to an infection of the bone, while a bone abscess is a localized collection of pus within the bone. During this surgical intervention, an incision is made through the skin and soft tissue to access the infected area of the bone. The periosteum, which is the dense layer of vascular connective tissue enveloping the bones, is carefully elevated to expose the underlying cortical bone. A small section, or button, of the cortical bone is then removed to access the bone marrow, which is crucial for alleviating pressure caused by inflammation. This step is vital as it helps restore blood flow to the affected area, which is often compromised due to the infection. If pus is present, the initial opening may be enlarged using specialized instruments such as a chisel or gouge, allowing for better drainage and treatment of the abscess. In cases where the epiphysis, the end part of a long bone, is involved, a portion of the epiphyseal cortex may also be excised to ensure complete drainage and treatment of the infection.