CPT® Code 26105

The CPT® Code 26105 refers to an arthrotomy with biopsy specifically performed on the metacarpophalangeal (MCP) joint, which is one of the key joints in the hand. The MCP joints are located at the base of each finger, connecting the metacarpal bones of the palm to the proximal phalanges of the fingers. This procedure involves making an incision over the MCP joint to access the joint capsule. During the arthrotomy, the surgeon carefully dissects the surrounding soft tissues while protecting vital nerves and blood vessels. Once the joint capsule is exposed, it is incised to allow for direct visual inspection of the joint interior. Tissue samples may be collected from the joint capsule or the synovial membrane for laboratory analysis, which can provide critical information regarding the presence of disease or other pathological conditions. It is important to note that this procedure is reported for each MCP joint that is treated, ensuring that each intervention is accurately documented for coding and billing purposes.