2007 ICD-9-CM Procedure 22.9 Other operations on nasal sinuses 22.9 is a specific code that can be used to specify a procedure 22.9 contains 4 index entries View the full Volume 3 22.* hierarchy 22.9 also known as: Exteriorization of maxillary sinus Fistulization of sinus 22.9 excludes: dilation of frontonasal duct (96.21) Index entries containing 22.9: Exteriorization maxillary sinus 22.9 Fistulization sinus, nasal NEC 22.9 Operation nasal sinus NEC 22.9 nose, nasal NEC 21.99 sinus NEC 22.9