Look at the 40000 series Surgical Procedures on the Dentoalveolar Structures, one suggestion might be: 41899 Unlisted procedure, dentoalveolar structures
Remember to bill with the correct ICD-10-CM diagnosis code when billing under the medical plan. The majority of diagnosis codes will be found in chapter 11 K00-K14 Diseases of oral cavity and salivary glands. For example K08.59- Other unsatisfactory restoration of tooth (for a repeat root canal) or Chapter 13 M26-M27 Dentofacial anomalies [including malocclusion] and other disorders of jaw. For example M27.51 - Perforation of root canal space due to endodontic treatment.