CPT® Code 20705

Add-On Code

The CPT® Code 20705 refers to the removal of drug-delivery device(s) that are placed intra-articularly, which means within a joint space. This procedure is specifically reported separately in addition to the code for the primary procedure being performed. The context of this code involves the preparation, implantation, and subsequent removal of a hand-crafted intra-articular drug delivery device, which is typically utilized in conjunction with a primary surgical procedure aimed at addressing an infected joint. The process begins with the surgeon creating the drug delivery device using a mixture of surgical cement powder and antibiotic powder, combined with a liquid monomer under vacuum conditions to ensure proper consistency and effectiveness. Once the cement is prepared, it is poured into a silicone mold to form the device, which is then allowed to harden. After hardening, the silicone mold is removed, and the surgeon verifies that the device is appropriately sized and shaped for insertion into the joint space. The device is then affixed to the end of the bone using another batch of cement, and the surgical site is meticulously closed in layers to promote healing. The removal of the drug delivery device, as indicated by CPT® Code 20705, occurs during a primary arthrotomy procedure, which involves entering the joint without performing a joint revision. During this removal process, the surgeon carefully extracts the device from the joint space while ensuring minimal disruption to the surrounding bone tissue. Following the removal, the surgical wound is thoroughly irrigated and closed in layers to facilitate recovery.