AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2017 Issue 4; New/Revised ICD-10-CM Diagnosis Codes

Motor Neuron Disease

Codes G12.23, Primary lateral sclerosis, G12.24, Familial motor neuron disease, and G12.25, Progressive spinal muscle atrophy, have been created to identify these specific types of motor neuron diseases. Primary lateral sclerosis (PLS) is a disorder of the upper motor neurons that affects the face, arms and legs. When the nerve cells of the brain that control voluntary movement start to degenerate, the muscles stiffen and slow movement. PLS usually first causes weakness of the lower extremities, then the trunk, followed by the upper extremities, and bulbar muscles that are responsible for speech and swallowing. When the...

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