CPT® Code 25118

The procedure described by CPT® Code 25118 refers to a synovectomy of the extensor tendon sheath in the wrist, specifically targeting a single compartment. A synovectomy is a surgical intervention aimed at removing inflamed synovial tissue, which is the lining of the joint that can become swollen and painful due to various conditions, most notably rheumatoid arthritis. This inflammation can lead to discomfort and impaired function of the wrist, necessitating surgical intervention to alleviate symptoms and restore mobility. During the procedure, an incision is made on the posterior aspect of the wrist to access the affected area. The dorsal retinaculum, a fibrous band that stabilizes the extensor tendons, is carefully exposed, allowing the surgeon to make transverse incisions at both the proximal and distal borders. A longitudinal incision is then created through the sixth compartment, which houses the extensor carpi ulnaris tendon. This careful dissection enables the surgeon to elevate and displace the retinaculum radially, providing clear visibility and access to the inflamed extensor tendon compartment. The procedure culminates in the exploration of the affected compartment, where all inflamed synovial tissue is meticulously removed using a motorized suction shaving device. This code is specifically utilized when the synovectomy is performed on a single compartment, distinguishing it from CPT® Code 25119, which is used when the procedure includes resection of the distal ulna.