ICD-10-CM > K00-K95 > K00-K14 > K05 > K05.3 > K05.32 K05.32 Chronic periodontitis, generalized Non-Billable/Non-Specific Codes K05.321Chronic periodontitis, generalized, slightK05.322Chronic periodontitis, generalized, moderateK05.323Chronic periodontitis, generalized, severeK05.329Chronic periodontitis, generalized, unspecified severity