ICD-10-CM > K00-K95 > K00-K14 > K05 > K05.2 > K05.22 K05.22 Aggressive periodontitis, generalized Non-Billable/Non-Specific Codes K05.221Aggressive periodontitis, generalized, slightK05.222Aggressive periodontitis, generalized, moderateK05.223Aggressive periodontitis, generalized, severeK05.229Aggressive periodontitis, generalized, unspecified severity