CPT® Code 27330

The procedure described by CPT® Code 27330 refers to an arthrotomy of the knee, specifically performed with a synovial biopsy only. An arthrotomy is a surgical procedure that involves making an incision into a joint, in this case, the knee joint. The process begins with a skin incision made over the knee, followed by careful dissection of the surrounding tissues to expose the joint capsule. Once the joint capsule is accessed, it is opened to allow for direct examination of the knee joint. During this examination, the joint is flushed with saline solution to clear any debris that may be present, ensuring a clear view of the joint's interior. The primary focus of this procedure is to perform a synovial biopsy. The synovial tissue, which lines the knee joint, plays a crucial role in producing synovial fluid that lubricates the joint. This tissue can become inflamed due to various conditions, including rheumatoid arthritis or synovial proliferative disorders. By obtaining samples of the synovial tissue, healthcare providers can conduct laboratory analyses to diagnose underlying issues affecting the knee joint. It is important to note that this procedure is distinct from other related procedures, such as CPT® Code 27331, which involves a more extensive exploration of the joint, including the removal of loose or foreign bodies and additional tissue sampling. The synovial biopsy performed under CPT® Code 27330 is specifically focused on obtaining tissue samples for diagnostic purposes without the additional interventions associated with joint exploration.