2007 ICD-9-CM Procedure 21.99 Other 21.99 is a specific code that can be used to specify a procedure 21.99 contains 2 index entries View the full Volume 3 21.* hierarchy 21.99 excludes: dilation of frontonasal duct (96.21) irrigation of nasal passages (96.53) removal of: intraluminal foreign body without incision (98.12) nasal packing (97.32) replacement of nasal packing (97.21) Index entries containing 21.99: Dilation nares 21.99 Operation nose, nasal NEC 21.99 sinus NEC 22.9