Does anyone know the CPT code (s) for an endoscopic medial maxillectomy with drainage of extramaxillary sinus mucocele? He did an endoscopic endonasal resection of the mass with drainage/excision of the parasinus mass and use of intra-operative navigation, extradural. Patient had orbital trauma many years ago. This was all performed endoscopically not an external approach. Physician wants to use 31299. Thanks.