Hi guest! Great question. The diagnosis code(s) used are actually going to completely depend on the patient and what their condition is! It looks like the most commonly used ICD-10 diagnosis codes for sinus lifts are: K08.21 – Minimal atrophy of the mandible K08.22 – Moderate atrophy of the mandible K08.23 – Severe atrophy of the mandible K08.24 – Minimal atrophy of maxilla K08.25 – Moderate atrophy of the maxilla K08.26 – Severe atrophy of the maxilla Hope this helps!