Deleted CDT codes you should know for 2026
CDT 2026 features 60 changes, including 6 deletions
CDT 2026 boasts 60 code changes, including six deletions.
Below is information about the six deleted codes to help dentists stay up to date as they begin using the new CDT Code come Jan. 1, 2026.
D1352 preventive resin restoration in a moderate to high caries risk patient — permanent tooth
The deletion of code D1352 is related to the deletion of the descriptor for code D2391 resin-based composite — one surface, posterior. The descriptor had limited code D2391’s application to restorations penetrating into dentin. Because the procedure is done the same way for both codes, having only one code leads to less confusion when documenting.
D1705 AstraZeneca Covid-19 vaccine administration — first dose, D1706 AstraZeneca Covid-19 vaccine administration — second dose, D1707 Janssen Covid-19 vaccine administration, D1712 Janssen Covid-19 vaccine administration — booster dose
These four codes related to COVID-19 vaccination were deleted because the AstraZeneca and Janssen vaccines are no longer manufactured or supplied.
D9248 non-intravenous conscious sedation
The deletion of code D9248 is one of the changes made to the suite of anesthesia codes in CDT 2026. The deletion does not create a gap in the CDT Code, as several new codes replace this deleted one to establish current terminology and more accurate detail for documentation and reporting. “CDT Coding Guide: Nitrous Oxide, Sedation and General Anesthesia,” a new guidance document available at ADA.org/publications/cdt/coding-education, outlines the sweeping changes to anesthesia codes and serves as an aid to help dentists select the appropriate new and revised codes.
The CDT 2026 and Coding Companion Kit and Consumer-Friendly CDT 2026: Plain Language Terms for Patient Communication are available for purchase at ADAStore.org.
For the first time, the ADA is also offering a continuing education series to explain some of the changes in CDT 2026. The 2026 CDT Codes: Clinical Practice Series includes eight on-demand courses that give a comprehensive look into the structure, maintenance and ongoing updates of CDT codes. The eight courses can be purchased individually or as a bundle at ADAStore.org.
Visit ADA.org/CDT for more information on the CDT Code.
