CPT® Code 11981

The CPT® Code 11981 refers to the procedure of inserting a drug-delivery implant, which can be classified as bioresorbable, biodegradable, or non-biodegradable. A drug delivery implant is a specialized device designed to release medication at a controlled rate over a specified period. Bioresorbable and biodegradable implants are unique in that they are designed to break down and be absorbed by the body naturally, eliminating the need for surgical removal after their therapeutic effect has been achieved. The term "bioresorbable" emphasizes the body's metabolic processes that facilitate the breakdown of the implant, while "biodegradable" highlights the implant's inherent properties that allow it to be decomposed by biological activity. These implants typically consist of a drug reservoir encased in a polymer or a mixture of drug and polymer, which gradually releases the medication as the polymer degrades. Common materials used for bio-absorbable polymers include hydrogels such as poly(lactic acid) and poly(glycolic acid). In contrast, non-biodegradable implants remain in the body until they are manually removed after the treatment period. The implants are generally cylindrical in shape and are inserted using a specialized device provided by the drug manufacturer. The insertion process involves selecting an appropriate site, often the inner aspect of the upper arm, followed by cleansing the area. A local anesthetic is administered to minimize discomfort, and a small incision is made to facilitate the insertion of the implant. The insertion tool, pre-loaded with the implant, is then carefully inserted through the incision and advanced subcutaneously until the implant reaches the desired position. Once in place, the implant is released from the insertion tool, which is subsequently withdrawn. The physician palpates the skin over the implant to confirm its proper positioning before closing the incision. This procedure is essential for delivering medication effectively and ensuring patient compliance with treatment regimens.