D9222 Dental Code: Deep Sedation/General Anesthesia (First 15 Min)

What D9222 covers

D9222 reports the first 15-minute increment of deep sedation or general anesthesia. Deep sedation and general anesthesia take the patient to a state where purposeful response to stimulation is reduced or absent, which is a deeper plane than moderate sedation. The code is billed by elapsed time, not by procedure, and the first 15-minute block, or any portion of it, is one unit of D9222.

The first unit is D9222. Every 15-minute block after that, or any portion of one, is a unit of D9223. The two codes work as a pair: D9222 opens the case, D9223 extends it.

D9222 does not cover:

• Each additional 15-minute increment after the first. That is D9223.
• General anesthesia that requires an advanced airway. That is the new 2026 pair, D9224 and D9225.
• IV moderate (conscious) sedation. That is D9239 for the first increment and D9243 for each additional one.
• Nitrous oxide as a single agent. That is D9230.

The distinguishing axis: depth, then airway, then increment

Three things separate D9222 from the codes around it, and getting them in order is what keeps the claim clean.

First, depth of sedation. Deep sedation and general anesthesia (D9222/D9223) are a deeper plane than moderate sedation (D9239/D9243). Moderate sedation keeps the patient responsive to verbal commands and maintaining their own airway. Deep sedation and general anesthesia reduce or remove purposeful response. The anesthesia record describes the plane reached, and the code has to agree with it.

Second, airway, which is new for 2026. Deep sedation or general anesthesia managed without an advanced airway device is D9222 and D9223. General anesthesia that requires an advanced airway is the new code pair, D9224 and D9225. An advanced airway means an intubation or a supraglottic device, such as a laryngeal mask airway, a laryngeal tube, or an endotracheal tube. If the provider placed one of those, the case moved to D9224/D9225, not D9222/D9223.

Third, first increment versus add-on. D9222 is the first 15 minutes. D9223 is each subsequent 15 minutes. The same first-versus-additional split exists for every time-based sedation pair.

What changed for 2026

Three changes in the 2026 CDT release touch this code, and all three have bitten offices working from older code tables.

D9222 and D9223 were revised. The descriptors now state the increment is 15 minutes or any portion of one, and they specify the code applies with or without nitrous oxide given alongside. The procedure they report is unchanged; the wording was tightened.

D9224 and D9225 were added. These are new codes for general anesthesia that requires an advanced airway, on the same first-15-minutes and each-subsequent-15-minutes structure as D9222/D9223. Before 2026 there was no separate code for the advanced-airway case. Now there is, and a case that needs intubation or a supraglottic device belongs on the new pair.

Nitrous oxide folded in. When nitrous rides along with deep sedation or general anesthesia, it is now part of the anesthesia service and not a separate line. D9230 is reported only when nitrous is the single agent. Offices that habitually added a nitrous line to every sedation claim should stop doing that on combined cases.

How the time units stack

Deep sedation and general anesthesia are billed by elapsed time, in 15-minute units. The clock generally starts when the provider begins administering the anesthetic drugs and stops when the patient is stable enough to be monitored by trained staff without the provider’s continuous attendance. The anesthesia record needs both times.

Worked example for a 40-minute case:

• First 15 minutes: D9222, one unit.
• Minutes 16 through 30: D9223, one unit.
• Minutes 31 through 40: D9223, one unit (any portion of a 15-minute block counts as a full unit).

So a 40-minute case is D9222 plus two units of D9223. The math is straightforward once the start and stop times are on the record. Where claims fall apart is when the times are missing and the carrier has nothing to adjudicate the units against.

When to bill D9222

Bill D9222 when:

• The provider administers deep sedation or general anesthesia, without an advanced airway, and the documented time is the first 15-minute increment.
• The anesthesia record shows the start time and the depth of sedation reached.
• An advanced airway was not placed. If it was, the case is D9224/D9225.

Do not bill D9222 for:

• Each additional 15-minute increment. Those are units of D9223.
• General anesthesia with an advanced airway. Use D9224 and D9225.
• IV moderate (conscious) sedation. Use D9239 and D9243.
• Nitrous oxide as the only agent. Use D9230.

Coverage reality and medical cross-coding

Coverage for deep sedation and general anesthesia is plan-dependent, and it is one of the surfaces where dental and medical insurance overlap.

On the dental side, many plans pay deep sedation or general anesthesia only when it is medically necessary, commonly tied to a surgical procedure, the patient’s age, or a documented condition. A case requested for anxiety alone on a routine procedure is frequently denied as not necessary. Some plans require prior authorization. Some cap the total anesthesia time or units they will pay, which reaches the D9223 add-on units more than the first unit.

Many deep sedation and general anesthesia cases also have a path to medical insurance rather than dental, particularly for hospital or surgical-center settings, patients with a qualifying medical condition, or cases that meet a payer’s medical-necessity criteria. Medical billing uses its own code set and its own prior-authorization rules, so a case that goes to medical is not simply the CDT code sent to a medical payer. Decide before treatment whether the case belongs on dental or medical, and verify the specific benefit on whichever side you are billing.

The practical takeaway: verify the anesthesia benefit specifically, confirm whether prior authorization is required, and determine whether the case should be cross-coded to medical, all before the appointment. None of that is universal, so quote the patient based on what the specific plan says rather than on what an anesthesia case usually pays.

Documentation that supports the claim

Deep sedation and general anesthesia claims get reviewed, so the anesthesia record carries the weight. It generally needs:

• Start time, defined as when drug administration began, and stop time, defined as when the provider’s continuous attendance ended. These support every time unit.
• The depth of sedation reached, so the deep/general code is defensible against the moderate codes.
• The airway technique, including whether an advanced airway was placed, which now decides between D9222/D9223 and D9224/D9225.
• The drugs given, doses, and route.
• Vital signs monitored throughout the case.
• The procedure performed and the medical-necessity reason the anesthesia was indicated.

For the claim, the medical-necessity narrative does the most work. A line tying the anesthesia to the procedure or to a documented patient condition prevents the common “not necessary” denial. “Deep sedation indicated for surgical extraction of impacted third molars in a patient unable to tolerate treatment otherwise, total anesthesia time 40 minutes” does more than a bare code with no context.

What to get right in your PMS

The exact menus differ across Open Dental, Dentrix, Eaglesoft, Curve, and Carestream, but the setup that prevents rejections is the same:

1. Always report D9222 before D9223. D9223 is an add-on. A claim with the add-on and no first unit is an orphan and gets rejected. D9222 opens the case.
2. Capture start and stop times on the anesthesia record at the time of treatment. Times reconstructed later are the first thing an anesthesia audit challenges.
3. Add the new D9224 and D9225 codes and label them as the advanced-airway pair. Keep them distinct from D9222/D9223 so the biller picks by what the chart says about the airway, not by habit.
4. Stop billing D9230 separately when nitrous rides along with deep sedation. The 2026 change folded combined nitrous into the anesthesia service. D9230 stands alone only as a single agent.
5. Match the depth of sedation to the code family. Deep and general are D9222/D9223 (or D9224/D9225 with an advanced airway); moderate is D9239/D9243. The record has to agree with the code.
6. Verify the benefit and decide dental versus medical before quoting. Anesthesia coverage is plan-specific, some cases cross-code to medical, and prior authorization is common. Put the patient’s out-of-pocket number in writing before treatment.