ICD-10-CM > K00-K95 > K00-K14 > K06 > K06.0 > K06.02 K06.02 Gingival recession, generalized Non-Billable/Non-Specific Codes K06.020Generalized gingival recession, unspecifiedK06.021Generalized gingival recession, minimalK06.022Generalized gingival recession, moderateK06.023Generalized gingival recession, severe