2006 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 > 2006 ICD-9-CM Diagnosis 383 Mastoiditis and related conditions View the most recent version of ICD-9-CM 383 383 is a non-specific code that cannot be used to specify a diagnosis