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CDT Code Changes 2018

Changes to the “Code on Dental Procedures and Nomenclature,” commonly known as the CDT Code, are effective for services provided on or after January 1, 2018. The CDT Code is reviewed annually by the American Dental Association (ADA) and updated to reflect changes in dental procedures accepted by the dental community. Each revised version takes effect January 1 of each year.

Any dental claim submitted electronically or paper must use procedure codes from the current version of the CDT Code. 

The 2018 version of the CDT Code incorporates a significant number of procedure code changes with 18 new procedure codes, 16 revised procedure codes, and 3 deleted codes. 

Changes to note:

  • New code D9222 - Deep sedation/general anesthesia - first 15 minutes
  • Revised code D9223 - Deep sedation/general anesthesia - each subsequent 15 minutes
  • New code D9239 - Intravenous moderate sedation/analgesia - first 15 minutes
  • Revised code D9243 - Intravenous moderate sedation/analgesia - each subsequent 15 minutes
  • New codes D5511, D5512, D5612, D5621, D5622 - Prosthodontics, repairs to complete dentures

With all new code changes, we recommend that dentists and dental offices verify covered services for patients before rendering treatment. Details of individual coverage can be verified by calling our customer service department or by going online through the Dental Office Toolkit. 

Accurate coding promotes faster claim processing and fewer errors.  Delta Dental recommends that each dental office have a current copy of the CDT Code. To order a copy of the CDT Code, call the ADA at 800-947-4746, or go online at