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 > Mastoiditis And Related Conditions 383.* > 2006 ICD-9-CM Diagnosis 383.1 Chronic mastoiditis View the most recent version of ICD-9-CM 383.1 383.1 is a specific code that can be used to specify a diagnosis 383.1 contains 5 index entries View the ICD-9-CM Volume 1 383.* hierarchy Alternate Terminology Caries of mastoid Fistula of mastoid 383.1 Excludes tuberculous mastoiditis (015.6)  Index entries containing 383.1: Caries (bone) (see also Tuberculosis, bone) 015.9 [730.8] mastoid (chronic) (process) 383.1 Fistula (sinus) 686.9 mastoid (process) (region) 383.1 Mastoiditis (coalescent) (hemorrhagic) (pneumococcal) (streptococcal) (suppurative) 383.9 chronic (necrotic) (recurrent) 383.1 Necrosis, necrotic mastoid (chronic) 383.1 Sclerosis, sclerotic mastoid 383.1