Administration of nitrous oxide when delivered as a single agent. CDT 2026 revised this code to clarify that it covers nitrous oxide as a standalone sedation method during dental procedures.
Get help with D9230 claims →Patients with dental anxiety who need mild sedation to tolerate treatment.
Children who need help cooperating during dental procedures.
Patients with a strong gag reflex who have difficulty tolerating dental work.
These are the denial reasons we see most often for D9230. Each one is preventable with proper documentation.
Many plans exclude nitrous oxide entirely. It is considered an elective service by most payers.
Some payers consider nitrous included in the procedural fee and deny it as a separate charge.
Plans that do cover nitrous may require documentation of a medical or psychological condition necessitating sedation.
Document the clinical reason for nitrous: anxiety, gag reflex, medical condition.
Record that informed consent was obtained.
Note the percentage of nitrous, duration of administration, and patient response.
Document that the patient was given 100% oxygen at the end and was alert before discharge.
Most dental plans do not cover nitrous oxide. It is typically an out-of-pocket expense for the patient. Some plans cover it for patients under a certain age (commonly under 14) or for patients with documented medical conditions that require anxiolysis. Always verify coverage before the appointment and inform the patient of the expected charge.
Even when not covered by insurance, nitrous oxide is a valuable service that many patients are willing to pay for out of pocket. Present it as an option during treatment planning and quote the fee upfront. Most practices charge a flat fee regardless of appointment length.
Even though nitrous is rarely covered, proper documentation protects the practice. Record the start and end time, the percentage of nitrous administered (typically 30-50%), the patient's response during the procedure, and confirmation that 100% oxygen was administered for at least 5 minutes before the patient was discharged. This documentation is required by your state dental board regardless of insurance coverage.
Our team handles D9230 billing daily. We know the denial patterns, documentation requirements, and appeal strategies that get claims paid.
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