CDT code · Periodontics
D4342: Periodontal Scaling and Root Planing, One to Three Teeth per Quadrant
Definition
D4342 is the CDT code for scaling and root planing of one to three teeth with periodontal disease in one quadrant.
Why it matters for the front desk
D4342 has the same documentation needs as D4341 (periodontal charting and x-rays) but pays less. The tooth count in each quadrant decides which code is correct, so the front desk should match the claim to the hygienist's chart, quadrant by quadrant. A quadrant with four involved teeth billed as D4342 loses money, and the reverse can trigger a denial or audit.
Related terms
- D4341: Periodontal Scaling and Root Planing, Four or More Teeth per Quadrant D4341 is the CDT code for scaling and root planing (deep cleaning) of four or more teeth with periodontal disease in one quadrant of the mouth.
- D4346: Scaling in Presence of Generalized Moderate or Severe Gingival Inflammation D4346 is the CDT code for a full mouth scaling, after an oral evaluation, for a patient with generalized moderate or severe gum inflammation but no bone loss from periodontitis.
- D4355: Full Mouth Debridement D4355 is the CDT code for removing heavy plaque and calculus that prevents a comprehensive periodontal evaluation and diagnosis, which then takes place at a later visit.