What D9230 means

D9230 covers analgesia and anxiolysis by inhalation of nitrous oxide. "D" is dental, "92" is the anesthesia group, and "30" is this code. Nitrous oxide, commonly called laughing gas, is a mild sedative breathed through a small mask that helps relax anxious patients while keeping them awake and responsive. Its effects wear off quickly after the mask is removed.

It's widely used to make dental visits more comfortable for nervous patients and children, and to help people tolerate longer or more involved procedures. Because it's inhaled and reversible, patients can usually drive themselves home afterward, unlike deeper forms of sedation.

From a coverage standpoint, nitrous oxide is inconsistently reimbursed. It may be a covered benefit when used with oral surgery, but it's often not covered for routine procedures. Where it isn't a covered benefit, many states allow the office to charge the patient their fee for it, so practices verify the plan first.

When it's typically used

D9230 is reported when nitrous oxide is used to reduce anxiety and discomfort during dental treatment — often for nervous patients, children, or longer procedures where light, fast-acting sedation helps.

How much does D9230 cost?

Nitrous oxide is a modest add-on fee, often roughly 40 to 100 USD per visit depending on region, office, and how long it's used. It's charged in addition to the dental procedure itself.

Is D9230 covered by insurance?

Coverage is inconsistent — nitrous may be paid when used with oral surgery but is frequently not a benefit for routine procedures. Where it isn't covered, many states permit the office to bill the patient directly, so verifying the plan in advance avoids surprises.

Frequently asked questions

What is the D9230 dental code?

It's inhaled nitrous oxide — 'laughing gas' — used to reduce anxiety during dental treatment, a mild sedative breathed through a mask.

Is laughing gas safe and does it wear off quickly?

Nitrous oxide is a mild, reversible sedative that keeps you awake and responsive, and its effects fade quickly after the mask is removed, so you can usually drive home.

How much does D9230 nitrous oxide cost?

Often around 40 to 100 USD per visit depending on location, office, and how long it's used, charged on top of the procedure.

Does insurance cover nitrous oxide?

Inconsistently. It may be covered with oral surgery but is often not a benefit for routine procedures. Where not covered, many states let the office bill the patient.

Will I be asleep with nitrous oxide?

No. Nitrous oxide is a light sedative that relaxes you while keeping you awake and able to respond, unlike deeper sedation or general anesthesia.

Is nitrous oxide good for anxious patients and kids?

Yes, it's widely used to help nervous patients and children stay comfortable and tolerate dental treatment.

This page is an independent, plain-language explanation for general information only. It is not billing, coding, or clinical advice. For the official CDT descriptor and current-year wording, refer to the American Dental Association.