ICD-10-CM > K00-K95 > K00-K14 > K08 > K08.2 K08.2 Atrophy of edentulous alveolar ridge Non-Billable/Non-Specific Codes K08.20Unspecified atrophy of edentulous alveolar ridgeK08.21Minimal atrophy of the mandibleK08.22Moderate atrophy of the mandibleK08.23Severe atrophy of the mandibleK08.24Minimal atrophy of maxillaK08.25Moderate atrophy of the maxillaK08.26Severe atrophy of the maxilla