Need some help in coding for oral grafting. A facial plastic surgeon is using cadaveric tissue to fill a void/soft tissue defect in the oral cavity.,either the result of a tumor/lesion resection or genetic issue. Would the following codes be correct?
15004 surgical prep
15335 acellular dermal allograft
41820 for excision gingiva or 41116 excision lesion of floor of mouth

thanks for the help, this is out of my area of expertise.