I. Diagnostic D0100-D0999
II. Preventive D1000-D1999
III. Restorative D2000-D2999
IV. Endodontics D3000-D3999
V. Periodontics D4000-D4999
VI. Prosthodontics, removable D5000-D5899
VII. Maxillofacial Prosthetics D5900-D5999
VIII. Implant Services D6000-D6199
IX. Prosthodontics, fixed D6200-D6999
X. Oral and Maxillofacial Surgery D7000-D7999
XI. Orthodontics D8000-D8999
XII. Adjunctive General Services D9000-D9999