G12 Spinal muscular atrophy and related syndromesNon-billable header with 5 child codes.
G12.0 Infantile spinal muscular atrophy, type I [Werdnig-Hoffman]G12.1 Other inherited spinal muscular atrophyG12.2 Motor neuron diseaseG12.8 Other spinal muscular atrophies and related syndromesG12.9 Spinal muscular atrophy, unspecified