What is dental code D4321?

Dental code D4321 refers to the procedure of "Periodontal Scaling and Root Planing - 1-3 Teeth per Quadrant." This code is used to bill for a deep cleaning treatment that targets periodontal disease by removing plaque and tartar from below the gum line for a limited number of teeth in a specific quadrant of the mouth. It is typically performed to improve gum health and is often part of a comprehensive periodontal treatment plan.