CDT code · Periodontics
D4355: Full Mouth Debridement
Definition
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.
Why it matters for the front desk
D4355 is a preliminary procedure, not a cleaning, and it is common for patients who haven't been seen in years. Because the full evaluation happens at a subsequent visit, schedule that visit before the patient leaves. Many plans limit D4355 to once in a lifetime or once every few years, and some count it toward cleaning frequency, so verify before booking.
Related terms
- D4342: Periodontal Scaling and Root Planing, One to Three Teeth per Quadrant D4342 is the CDT code for scaling and root planing of one to three teeth with periodontal disease in one quadrant.
- 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.
- D4910: Periodontal Maintenance D4910 is the CDT code for the ongoing maintenance cleaning given to a patient after active periodontal treatment, such as scaling and root planing.