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A skin allograft is a medical procedure that involves the application of donor skin to specific areas of the body, including the face, scalp, eyelids, mouth, neck, ears, orbits, genitalia, hands, feet, and/or multiple digits, for the purpose of temporary wound closure. This procedure is particularly beneficial for patients suffering from extensive burns or other significant skin loss, where the availability of the patient's own skin (autogenous skin) is insufficient to cover the affected areas. The primary function of a temporary skin allograft is to provide a protective covering over the wound, which not only absorbs drainage but also prevents the wound from drying out, thereby promoting a conducive environment for healing. These allografts are typically split-thickness skin grafts that are harvested from cadaver donors and are cryopreserved until they are required for use. When needed, the allograft is carefully thawed and prepared for grafting onto the wound bed. The application process involves securing the allograft with absorbable sutures to ensure it remains in place. Following the graft application, a layered dressing is applied, which includes a nonadherent layer to protect the graft, a bulky layer of gauze for cushioning, a compression layer to minimize swelling, and an anti-shear layer to prevent friction. The CPT® Code 15320 is designated for the use of the first 100 square centimeters of allograft skin in adults or for 1% of the total body surface area (TBSA) in infants and children, while additional areas are coded with CPT® Code 15321.
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