Hi Guest! D7951 – sinus augmentation with bone or bone substitutes via a lateral open approach D6104 – bone graft at time of implant placement can be crosscoded to: 21210 – graft, bone; nasal, maxillary, or malar areas *use -52 modifier for reduced services when bone is not obtained from the patient D6010 – surgical placement of implant body: endosteal implant can be cross coded to: 21248 – Reconstruction of mandible or maxilla, endosteal implant (eg, blade, cylinder); partial(3or less) 21249 – Reconstruction of mandible or maxilla, endosteal implant (eg, blade, cylinder); complete (4 or more) Hope this helps!