2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Diseases Of The Ear And Mastoid Process 380-389 > Mastoiditis And Related Conditions 383.* > 2008 ICD-9-CM Diagnosis 383.89 Other disorders of mastoid  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 383.89 can be accessed here. 383.89 is a specific code that can be used to specify a diagnosis 383.89 contains 1 index entry View the ICD-9-CM Volume 1 383.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. Index entries containing 383.89: Perforation, perforative (nontraumatic) mastoid (antrum) (cell) 383.89