D1110Prophylaxis, Adult

What This Code Covers

D1110 covers a routine dental cleaning (prophylaxis) for adult patients, typically age 14 and older. The hygienist removes plaque, calculus, and stains from all tooth surfaces using hand instruments, ultrasonic scalers, or both, followed by polishing. This is a preventive service for patients with a healthy periodontium or gingivitis only, not for patients with active periodontal disease or a history of periodontal treatment. D1110 is almost always billed alongside D0120 and may include fluoride application (D1206).

Billing Guide

Bill this code when:

• Adult patient (14+) presents for a routine dental cleaning
• Patient does not have active periodontal disease or a history of periodontal treatment
• Probing depths are generally within normal limits (1-3mm)
• Cleaning is preventive in nature, not therapeutic

Do not bill this code when:

• Patient has a history of periodontal treatment (scaling and root planing, surgery). Use D4910 (periodontal maintenance)
• Patient has clinical signs of periodontitis (4mm+ pockets, bone loss). Use D4341 or D4342 (scaling and root planing)
• Patient is under the payer's age threshold for adult prophy. Use D1120 (child prophylaxis)
• Frequency limit exceeded without medical necessity documentation. Most plans cover two per year

Insurance and Denial Prevention

Key Payer Rules:

• Classified as preventive, typically covered at 100% in-network with no deductible
• Most plans allow two per benefit year, spaced at least six months apart
• Some plans (especially Medicaid) limit adult prophylaxis to once per year
• D1110 and D4910 may count toward the same two-per-year combined frequency
• D1110 and D1120 share frequency limitations and cannot receive both in the same window

Common Denials and How to Respond:

• Frequency exceeded → Verify benefit year dates and dates of prior cleanings. If the benefit year has reset, submit a corrected claim. If valid, patient pays out of pocket.
• Downgraded to D1120 → Check the payer's age cutoff for adult prophylaxis. If the patient meets the threshold, appeal with patient's date of birth.
• Should be periodontal maintenance (D4910) → Review the patient's perio history. If they had prior periodontal treatment, rebill under D4910. If no perio history exists, appeal with clinical documentation.