335 Anterior horn cell disease 
335.0 Werdnig-hoffmann disease convert 335.0 to ICD-10-CM 335.1 Spinal muscular atrophy 
335.10 Spinal muscular atrophy unspecified convert 335.10 to ICD-10-CM 335.11 Kugelberg-welander disease convert 335.11 to ICD-10-CM
335.19 Other spinal muscular atrophy convert 335.19 to ICD-10-CM 335.2 Motor neuron disease 335.20 Amyotrophic lateral sclerosis convert 335.20 to ICD-10-CM 335.21 Progressive muscular atrophy convert 335.21 to ICD-10-CM 335.22 Progressive bulbar palsy convert 335.22 to ICD-10-CM 335.23 Pseudobulbar palsy convert 335.23 to ICD-10-CM 335.24 Primary lateral sclerosis convert 335.24 to ICD-10-CM 335.29 Other motor neuron diseases convert 335.29 to ICD-10-CM 335.8 Other anterior horn cell diseases convert 335.8 to ICD-10-CM 335.9 Anterior horn cell disease unspecified convert 335.9 to ICD-10-CM