2006 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Disorders Of The Peripheral Nervous System 350-359 > Myoneural Disorders 358.* > 2006 ICD-9-CM Diagnosis 358.0 Myasthenia gravis View the most recent version of ICD-9-CM 358.0 A disorder of neuromuscular transmission characterized by weakness of cranial and skeletal muscles. Autoantibodies directed against acetylcholine receptors damage the motor endplate portion of the NEUROMUSCULAR JUNCTION, impairing the transmission of impulses to skeletal muscles. Clinical manifestations may include diplopia, ptosis, and weakness of facial, bulbar, respiratory, and proximal limb muscles. The disease may remain limited to the ocular muscles. THYMOMA is commonly associated with this condition. 358.0 is a non-specific code that cannot be used to specify a diagnosis View the ICD-9-CM Volume 1 358.* hierarchy