Every January the American Dental Association’s Code Maintenance Committee updates the Current Dental Terminology (CDT) code set, and every year some practices miss the changes until claims start bouncing. CDT 2026 is a meaningfully sized update — 31 new codes, 14 revised code descriptors, and 6 deletions — touching diagnostics, dentures, implant maintenance, anesthesia, and preventive services. Here’s what actually changed and what your billing team needs to update before the next round of claims goes out.
New codes for 2026
The 31 additions span several clinical categories, and a few clusters are worth flagging specifically because they replace workflows practices have historically coded around with less precise codes or narrative claims:
- Diagnostic testing: D0426 (saliva-based caries susceptibility or similar testing) and D0461 (cracked tooth testing) give practices dedicated codes for diagnostic procedures that previously had to be billed under a generic or unlisted code.
- Denture and prosthesis codes: D5877 and D5878 cover duplicate dentures (maxillary and mandibular respectively) — useful for patients who need a backup denture, a scenario that previously had no clean code. D5909 and D5930 address maxillary guidance prostheses, while D5938 through D5941 and D5942 through D5949 add granularity for resection prostheses and implant-supported resection prostheses, which is relevant for post-surgical and oncology-related prosthodontic cases.
- Implant maintenance: D6049 (implant scaling and debridement), D6280 (implant maintenance for full-arch removable dentures), and D6196 (removal of an indirect implant restoration) give practices dedicated codes for maintenance visits that were often previously billed under general periodontal maintenance codes not designed for implant-specific anatomy.
- Anesthesia and sedation: D9224 and D9225 are new codes specifically for general anesthesia when an advanced airway is placed and used throughout the procedure, and D9244 through D9247 create a more granular in-office minimal and moderate sedation code set. These are significant enough changes that they deserve their own deeper look (see below and our companion piece on D9224/D9225 denials specifically).
- Other additions: D1720 (influenza vaccine administration), D9128 and D9129 (photobiomodulation therapy), and D9936 (occlusal guard cleaning and inspection) round out the new code set.
Revised codes
Fourteen existing code descriptors were revised for 2026, including D0180, D2391, the D5863 through D5867 series, D7285 and D7286, D9222 and D9223, D9230, and D9243. Revisions matter just as much as new codes because a claim submitted with the old understanding of a descriptor — even using the correct code number — can get denied or down-coded if the documentation no longer matches what the revised descriptor actually requires. The D9222/D9223 revision is particularly important to understand alongside the new D9224/D9225 codes: with D9224/D9225 now carved out specifically for general anesthesia cases involving an advanced airway, D9222/D9223 have been revised to reflect that they apply to deep sedation/general anesthesia scenarios where no advanced airway is placed. Billing the wrong pair for the airway management actually used is one of the most likely sources of anesthesia claim denials in 2026 — again, see our dedicated piece on that issue.
Deleted codes
Six codes were deleted for 2026: D1352 (preventive resin restoration), the COVID-19 vaccine administration codes D1705, D1706, D1707, and D1712, and D9248 (non-intravenous conscious sedation). The COVID-19 vaccine code deletions reflect the wind-down of dedicated dental billing codes for pandemic-era vaccine administration; if your practice still administers vaccines, check current CDT and payer guidance for the correct current code rather than defaulting to a deleted one out of habit. D9248’s deletion is tied to the broader sedation code overhaul — its function is effectively absorbed and made more specific by the new D9244–D9247 code set.
What to actually do before your next claims run
- Update your practice management system’s code set immediately if you haven’t already — a deleted code that’s still active in your system will generate denials the moment a payer’s adjudication system rejects it outright rather than downcoding it.
- Retrain clinical staff on documentation for the new implant-maintenance and denture codes. A new code with no corresponding change in how the clinical note is written will get denied for insufficient documentation just as easily as an old code used incorrectly.
- Specifically flag anesthesia and sedation coding for a documentation audit — the D9222/D9223 versus D9224/D9225 distinction, and the new D9244–D9247 granularity, are the most likely spots for denials in the first two quarters after the change, since they require documentation elements (specific airway device used, sedation route, time increments) that older sedation codes didn’t demand as precisely.
- Check with each major payer on their CDT 2026 adoption timeline. Most commercial and Medicaid dental plans adopt the current CDT code set on a rolling basis; a payer that hasn’t yet updated its claims edits to recognize a new 2026 code may reject it even though it’s technically valid, so confirm rather than assume universal same-day adoption.
Practices that handle this transition well tend to run a short internal training specifically on the anesthesia and implant-maintenance changes rather than a single “here’s the new code list” email — those two clusters require the biggest shift in what the clinical documentation actually needs to say, and a code list alone doesn’t communicate that.
Why a mid-year audit is worth scheduling
Most practices review new codes once, right around January, and then move on. With a change set this size, that’s not really enough. A mid-year audit — pulling a sample of claims from each of the categories touched by CDT 2026 (diagnostics, dentures, implant maintenance, anesthesia, preventive services) and checking them against both the correct code and the documentation the revised or new descriptor actually requires — tends to surface problems well before they show up as a pattern of denials serious enough to trigger a payer audit of your own. It’s a modest time investment relative to the cost of untangling a systemic coding error six months after it started.
Takeaway
CDT 2026 brought 31 new codes, 14 revisions, and 6 deletions, with the heaviest documentation impact landing on anesthesia/sedation and implant-maintenance billing. Update your code set now, retrain on the anesthesia distinction between D9222/D9223 and D9224/D9225 specifically, and confirm each payer’s adoption timeline before assuming a new code will pay cleanly on the first submission.
Related specialty guide: Dental Billing and Coding Guide