What should the D9223 chart note include?
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Deep sedation/general anesthesia - additional 15 minutes. Continuation of D9222. Time Period: Time Period Start time: Start time End time: End time Increment number: Increment number Medications administered this period: Medications administered this period Supplemental O2 adjustment: Supplemental O2 adjustment Vital Signs (q5 min): Vitals log: Time/BP/HR/RR/SpO2/EtCO2 Level of Sedation: Level of Sedation Maintained at: Maintained at Adjustments needed: Adjustments needed Airway Status: Airway: Airway Interventions: Complications: None or describe. Recovery (if final increment): Recovery (if final increment) Reversal agents: Reversal agents Time to eye opening: Time to eye opening Time to following commands: Time to following commands Recovery room transfer time: Recovery room transfer time Discharge Criteria (if final increment): Vital signs stable. SpO2 >95% on room air. Alert and oriented. Ambulating with minimal assistance. Minimal nausea/vomiting. Pain controlled. Responsible adult/escort: Name/relationship. Total Sedation Summary: Total sedation time: Total sedation time Total D9223 increments: Total D9223 increments Sedation code support: ASA, NPO, consent, escort, emergency/medical necessity if applicable Monitoring record: Pre/intra/post-op vitals and monitored physiologic parameters Medication record: Medication, dose, route, time, response Patient tolerance: Tolerance/response.
What documentation is required for D9223?
D9223 is a time-based code, and time codes are audited on the anesthesia record more than the procedure note. The single most common reason D9223 increments are recouped is that the chart shows total sedation time but cannot reconcile each 15-minute block to documented monitoring. Every element below should appear in the anesthesia record for each D9223 increment billed.
- Anesthesia start time and end time, recorded to the minute. Start = first administration of sedative/anesthetic with continuous monitoring engaged. End = drugs discontinued and patient transferred to recovery monitoring (or fully recovered to baseline). Total anesthesia time is computed from these two stamps; the increment count must be defensible from that math.
- Increment numbering. Number each 15-minute block sequentially (Increment 1 = D9222, Increment 2 = first D9223, Increment 3 = second D9223, etc.). The claim's D9223 quantity should equal the highest numbered increment minus one.
- Vital signs at minimum every 5 minutes. ADA sedation guidelines and most state dental board rules require q5-minute monitoring at deep sedation/GA: blood pressure, heart rate, respiratory rate, SpO2, end-tidal CO2 (capnography), and level of consciousness. A 15-minute increment must show at least three monitoring entries in that block.
- Capnography (EtCO2) values. Continuous capnography is the standard of care for deep sedation/GA per the ADA guidelines and ASA practice advisory; a chart that lacks EtCO2 documentation invites denial and is a state-board liability concern in jurisdictions where capnography is mandated.
- Airway status per increment. Patent / partially obstructed / supported with chin lift or jaw thrust / oral or nasal airway placed / supraglottic airway / intubated. Note any airway intervention with time stamp; airway events are the single most consequential entries in an anesthesia record.
- Level of sedation per increment. Document that the patient was maintained at the intended depth (deep sedation or GA) and note any movement up or down the continuum. ASA continuum language ("purposeful response only after repeated or painful stimulation," "no purposeful response") is appropriate.
- Drug administration log. Each medication, dose, route, and time. Include induction agents (e.g., propofol, ketamine), supplemental boluses, opioids, benzodiazepines, antiemetics, local anesthetic dose with epinephrine concentration, and reversal agents (flumazenil, naloxone) if administered. Cumulative dose totals at the bottom of the record support the increment math.
- Supplemental oxygen. Liter flow and delivery method (nasal cannula, mask, nasal hood with scavenger). Adjustments during the increment should be timed.
- Complications or adverse events. Hypoxia, hypotension, hypertension, bradycardia, tachycardia, laryngospasm, bronchospasm, paradoxical reaction, prolonged emergence, nausea/vomiting. Document the event, the intervention, and the response. "None" is acceptable when true.
- Pre-anesthesia ASA classification, NPO status, weight, and consent on file — these belong in the D9222 portion of the record but are referenced when D9223 increments are reviewed because they establish that the patient was an appropriate sedation candidate at all.
- Recovery documentation when D9223 is the final increment. Time to eye opening, time to following commands, modified Aldrete score or equivalent discharge criteria, vital signs stable, SpO2 ≥95% on room air, ambulation status, nausea/pain control, and the responsible adult escort by name and relationship. Discharge with a minor or impaired escort is a frequent state-board complaint.
- Operator(s) of record. The dentist administering anesthesia, the dentist performing the operative procedure (if different), and any dedicated anesthesia monitor. Many states require a separately credentialed anesthesia provider or monitor for deep sedation/GA in a dental office; the chart should reflect compliance.
A common audit failure pattern: the claim shows D9222 + 4 × D9223 (75 minutes total) but the anesthesia record contains only 8 monitoring entries (40 minutes of q5 documentation). The reviewer cannot reconcile 75 minutes of billed time to 40 minutes of monitored time, and the additional D9223 units are clawed back. Treat the q5 monitoring entries as the proof-of-time, not the start/end stamps alone.
Why does D9223 get denied?
The most common reasons D9223 is denied, downgraded, or recouped:
- D9223 billed without D9222 on the same DOS — D9223 is an add-on code; carriers reject orphaned increments. The first 15 minutes must always be D9222.
- Increment count exceeds the carrier's per-encounter cap — additional units beyond the plan's 60-, 75-, or 90-minute ceiling are denied as exceeding medical necessity unless a narrative and the anesthesia record are submitted up front.
- Anesthesia record cannot reconcile billed time — claim shows 5 D9223 units (75 minutes total) but the chart's q5 monitoring entries cover only 50 minutes of documented monitoring; excess increments clawed back on post-payment audit.
- Missing or sparse q5 monitoring entries — state boards and payers expect monitoring at minimum every 5 minutes during deep sedation/GA. A 15-minute block with fewer than 3 monitoring entries is presumed undocumented for that increment.
- No capnography (EtCO2) documented — when state law or carrier policy requires capnography for deep sedation/GA, its absence is treated as a documentation deficiency and increment units may be denied.
- Sedation level not justified — chart shows the patient responded to verbal commands throughout, which is moderate sedation, not deep; carrier downgrades to D9239/D9243 (a substantial fee reduction) or denies as level-mismatch.
- Provider permit missing — claim submitted by a provider without an active state deep sedation/GA permit; payer credentialing flag denies the claim entirely.
- Medical necessity not established — sedation billed for an adult routine restorative case without documented severe phobia, special needs, or extensive surgical scope; carrier denies as elective.
- Prior authorization not obtained — Medicaid MCOs and several commercial plans require PA for deep sedation/GA; submitting without an approved PA on file results in denial.
- Recovery / discharge documentation missing — when D9223 is the final increment, absence of discharge criteria (vital signs stable, escort identified, post-op instructions reviewed) is a frequent recoupment trigger and a state-board liability.
- Increment math wrong on the claim — billing 4 D9223 units for 50 total minutes of anesthesia (which would be D9222 + 2 D9223 + 1 partial) creates an arithmetic mismatch the claims-edit system flags automatically.
- Same-day code conflict with D9230 or D9239/D9243 — carrier sees nitrous oxide or IV moderate sedation billed alongside deep sedation on the same DOS; only the highest level of sedation is payable.
- Surgical procedure could reasonably have been done under local anesthesia — single posterior extraction or a few restorations on a cooperative healthy adult, billed with deep sedation; carrier denies as not medically necessary.
What do practices ask about D9223?
What's the difference between D9222 and D9223?+
D9222 reports the first 15 minutes of deep sedation or general anesthesia on a date of service; D9223 reports each additional 15-minute increment after that. The two codes are designed to be billed together — D9222 once, then D9223 multiplied by the number of additional 15-minute blocks. You cannot bill D9222 twice on the same DOS, and most carriers will deny D9223 entirely if no D9222 appears on the claim.
How many D9223 increments can I bill on one encounter?+
There is no ADA-imposed cap, but most carriers limit D9223 to 3–5 increments per date of service (a total of 60–90 minutes of deep sedation/GA). Beyond the cap, additional units typically require a narrative justifying the extended anesthesia time and submission of the full anesthesia record. Medicaid MCOs commonly cap at 4 increments and require prior authorization for the entire sedation. Verify the patient's plan before sedating long cases.
Can I bill D9223 alongside D9239 or D9243 on the same date?+
No. D9222/D9223 (deep sedation/GA) and D9239/D9243 (IV moderate sedation) describe different points on the ASA sedation continuum. The patient is at one level of sedation for a given encounter, and only one code family is payable. If the anesthetic plan crossed levels, document the dominant level achieved and bill that family.
What counts as 'anesthesia time' for the increment math?+
Anesthesia time runs from the moment the operator begins continuous attendance to administer drugs and monitor the patient through the moment the patient is safely transferred to post-anesthesia recovery. It is not chair time, appointment length, or procedure-only time. Most carriers require the start and end times to the minute and expect the increment count to match q5-minute monitoring entries on the anesthesia record.
What if the case ran 38 minutes — how do I bill the partial increment?+
Carrier policies vary. The two common approaches are (1) bill only completed 15-minute blocks, so 38 minutes = D9222 + 1 × D9223 = 30 minutes billed and the extra 8 minutes are uncompensated; or (2) bill a partial increment when ≥8 minutes are documented, so 38 minutes = D9222 + 2 × D9223. The conservative default is the first approach unless the payer policy explicitly allows partial-block rounding. Document the actual end time either way.
Is capnography (EtCO2) required for D9223?+
The ADA Guidelines for the Use of Sedation and General Anesthesia by Dentists call for continuous capnography during deep sedation and general anesthesia, and most state dental boards have adopted that requirement. Even when a state has not formally adopted it, carriers reviewing D9223 increments expect EtCO2 monitoring documented in the anesthesia record. Charts that lack capnography for deep sedation/GA are at substantial risk on both audit and licensure review.
Can D9223 be billed in a hospital or ambulatory surgical center?+
Generally no — when deep sedation/GA is delivered in a hospital or ASC by a separate anesthesia provider, that provider bills medical anesthesia codes (CPT 00170 plus time units) on a CMS-1500. The dental office bills only the operative dental codes. D9222/D9223 are dental-office anesthesia codes used when the operating dentist or a credentialed in-office colleague delivers the anesthesia in the dental setting under the appropriate state permit.