Code	What it covers
D4210	Gingivectomy / gingivoplasty (4+ teeth)
D4211	Gingivectomy/gingivoplasty — 1–3 teeth
D4240	Gingival flap surgery with root planing (4+ teeth)
D4249	Clinical crown lengthening (hard tissue)
D4260	Osseous surgery (4+ teeth per quadrant)
D4263	Bone graft around a natural tooth (first site)
D4264	Bone graft around a natural tooth (additional site)
D4266	Guided tissue regeneration — resorbable membrane
D4267	Guided tissue regeneration — non-resorbable membrane
D4273	Connective tissue graft (gum graft)
D4341	Scaling & root planing, 4+ teeth per quadrant
D4342	Scaling & root planing, 1-3 teeth per quadrant
D4346	Full-mouth scaling for gum inflammation
D4355	Full mouth debridement (to enable evaluation)
D4381	Localized antibiotic delivery (per tooth)
D4910	Periodontal maintenance