00-99 CLASSIFICATION OF PROCEDURES
21-29 5. OPERATIONS ON THE NOSE, MOUTH, AND PHARYNX
22 Operations on nasal sinuses
22.3 External maxillary antrotomy


22.31 Radical maxillary antrotomy
0 + Includes
0 + Alphabetic Index entries

22.39 Other external maxillary antrotomy
0 + Includes
0 + Alphabetic Index entries