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 > ICD-9-CM Diagnosis 358 Myoneural disorders A general term encompassing lower MOTOR NEURON DISEASE; PERIPHERAL NERVOUS SYSTEM DISEASES; and certain MUSCULAR DISEASES. Manifestations include MUSCLE WEAKNESS; FASCICULATION; muscle ATROPHY; SPASM; MYOKYMIA; MUSCLE HYPERTONIA, myalgias, and MUSCLE HYPOTONIA. 358 is a non-specific code that cannot be used to specify a diagnosis ICD-9-CM Diagnosis 358.0 Myasthenia gravis 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 ICD-9-CM Diagnosis 358.00 Myasthenia gravis without (acute) exacerbation 358.00 is a specific code that can be used to specify a diagnosis 358.00 contains 14 index entries ICD-9-CM Diagnosis 358.01 Myasthenia gravis with (acute) exacerbation 358.01 is a specific code that can be used to specify a diagnosis 358.01 contains 2 index entries ICD-9-CM Diagnosis 358.1 Myasthenic syndromes in diseases classified elsewhere 358.1 is a specific code that can be used to specify a diagnosis 358.1 contains 11 index entries ICD-9-CM Diagnosis 358.2 Toxic myoneural disorders 358.2 is a specific code that can be used to specify a diagnosis 358.2 contains 3 index entries ICD-9-CM Diagnosis 358.8 Other specified myoneural disorders 358.8 is a specific code that can be used to specify a diagnosis 358.8 contains 8 index entries ICD-9-CM Diagnosis 358.9 Myoneural disorders unspecified A general term encompassing lower MOTOR NEURON DISEASE; PERIPHERAL NERVOUS SYSTEM DISEASES; and certain MUSCULAR DISEASES. Manifestations include MUSCLE WEAKNESS; FASCICULATION; muscle ATROPHY; SPASM; MYOKYMIA; MUSCLE HYPERTONIA, myalgias, and MUSCLE HYPOTONIA. 358.9 is a specific code that can be used to specify a diagnosis 358.9 contains 5 index entries