2007 ICD-9-CM Procedure 20.59 Other 20.59 is a specific code that can be used to specify a procedure 20.59 contains 7 index entries View the full Volume 3 20.* hierarchy 20.59 also known as: Apicectomy of petrous pyramid Tympanectomy Index entries containing 20.59: Apicectomy petrous pyramid 20.59 Excision petrous apex cells 20.59 Exenteration petrous pyramid air cells 20.59 Myringectomy 20.59 Myringodectomy 20.59 Removal -- see also Excision outer attic wall (middle ear) 20.59 Tympanectomy 20.59 with tympanoplasty -- see Tympanoplasty