2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Disorders Of The Eye And Adnexa 360-379 > Disorders Of The Orbit 376.* > 2006 ICD-9-CM Diagnosis 376.12 Orbital myositis View the most recent version of ICD-9-CM 376.12 A chronic neoplasm-like inflammatory reaction, usually affecting the orbital tissues of both eyes, also known as orbital myositis. 376.12 is a specific code that can be used to specify a diagnosis 376.12 contains 1 index entry View the ICD-9-CM Volume 1 376.* hierarchy  Index entries containing 376.12: Myositis 729.1 orbital, chronic 376.12