CPT® Code 40654

The procedure described by CPT® Code 40654 involves a full-thickness repair of the lip that exceeds one-half of the vertical height or is classified as complex. The lips are anatomically structured into three primary regions: the cutaneous, vermilion, and mucosal areas. The cutaneous region encompasses the outer skin of the lips, while the vermilion region is the pinkish-red area that is more delicate and consists of modified mucosal membrane. The mucosal portion is located inside the mouth and is adjacent to the teeth. In contrast to CPT® Code 40650, which focuses solely on the vermilion, the procedure under CPT® Code 40654 entails a comprehensive approach that includes the repair of the dermis and subcutaneous tissue of the cutaneous lip, in addition to the vermilion. The repair process is meticulous, beginning with the submucosa, followed by the orbicularis oris muscle, and concluding with the vermilion, ensuring that the vermilion border is precisely aligned. If the injury involves the mucosa, it may be addressed either before or after the repair of the vermilion and cutaneous lips. This code is specifically utilized for lacerations that are more extensive than half the vertical height of the lip or those that necessitate complex repair techniques, which may include debridement, extensive undermining, or the use of stents and retention sutures to achieve a satisfactory cosmetic result.