D4341Periodontal Scaling and Root Planing, Four or More Teeth Per Quadrant

What This Code Covers

D4341 covers scaling and root planing (SRP) performed on one quadrant where four or more natural teeth are present and affected by periodontal disease. The hygienist or dentist uses hand instruments and ultrasonic scalers to remove calculus, plaque, and bacterial toxins from root surfaces below the gum line. This is a therapeutic procedure used to treat periodontitis, not a preventive cleaning. It is billed per quadrant, so a full-mouth SRP on a patient with four or more teeth in each quadrant would be billed as four units of D4341.

Billing Guide

Bill this code when:

• Patient has a diagnosis of periodontitis with clinical attachment loss and bone loss
• Four or more natural teeth in the quadrant require subgingival scaling and root planing
• Probing depths are generally 4mm or greater with bleeding on probing
• Treatment is supported by current radiographs showing bone loss

Do not bill this code when:

• Patient has gingivitis only without bone loss or attachment loss. Use D1110 (prophylaxis)
• Fewer than four teeth in the quadrant need treatment. Use D4342 (SRP, 1-3 teeth)
• Patient has already completed active SRP and is returning for ongoing care. Use D4910 (periodontal maintenance)
• The procedure is a gross debridement to allow for evaluation. Use D4355 (full mouth debridement)

Insurance and Denial Prevention

Key Payer Rules:

• Classified as a basic or major service depending on the payer, typically covered at 60-80%
• Most plans require evidence of periodontal disease (pocket depths, bone loss, bleeding)
• Many payers limit SRP to once per quadrant every 24 months
• Some plans require a waiting period before SRP is covered on new policies
• D4341 and D1110 generally cannot be billed on the same quadrant on the same date

Common Denials and How to Respond:

• Not medically necessary -> Submit periodontal charting with pocket depths, bleeding points, and radiographs showing bone loss. Include a narrative from the treating provider explaining the diagnosis.
• Frequency exceeded (billed within 24 months) -> Check the patient's treatment history. If the prior SRP was with a different provider or plan, submit documentation showing this is the first treatment under the current benefit period.
• Downgraded to D1110 (prophylaxis) -> Appeal with full perio charting, radiographs, and a letter distinguishing the therapeutic nature of SRP from a preventive prophy. Emphasize the diagnosis of periodontitis.
• Missing documentation -> Resubmit with complete perio charting, radiographs, and a narrative. Many denials for this code are resolved simply by providing the clinical evidence upfront.