| G11 | Hereditary ataxia | NON-BILLABLE CODE |
| G11.0 | Congenital nonprogressive ataxia | BILLABLE CODE |
| G11.1 | Early-onset cerebellar ataxia | NON-BILLABLE CODE |
| G11.10 | Early-onset cerebellar ataxia, unspecified | BILLABLE CODE |
| G11.11 | Friedreich ataxia | BILLABLE CODE |
| G11.19 | Other early-onset cerebellar ataxia | BILLABLE CODE |
| G11.2 | Late-onset cerebellar ataxia | BILLABLE CODE |
| G11.3 | Cerebellar ataxia with defective DNA repair | BILLABLE CODE |
| G11.4 | Hereditary spastic paraplegia | BILLABLE CODE |
| G11.5 | Hypomyelination - hypogonadotropic hypogonadism - hypodontia | BILLABLE CODE |
| G11.6 | Leukodystrophy with vanishing white matter disease | BILLABLE CODE |
| G11.9 | Hereditary ataxia, unspecified | BILLABLE CODE |
