| E75.21 | Fabry (-Anderson) disease | BILLABLE CODE |
| E75.22 | Gaucher disease | BILLABLE CODE |
| E75.23 | Krabbe disease | BILLABLE CODE |
| E75.24 | Niemann-Pick disease | NON-BILLABLE CODE |
| E75.240 | Niemann-Pick disease type A | BILLABLE CODE |
| E75.241 | Niemann-Pick disease type B | BILLABLE CODE |
| E75.242 | Niemann-Pick disease type C | BILLABLE CODE |
| E75.243 | Niemann-Pick disease type D | BILLABLE CODE |
| E75.244 | Niemann-Pick disease type A/B | BILLABLE CODE |
| E75.248 | Other Niemann-Pick disease | BILLABLE CODE |
| E75.249 | Niemann-Pick disease, unspecified | BILLABLE CODE |
| E75.25 | Metachromatic leukodystrophy | BILLABLE CODE |
| E75.26 | Sulfatase deficiency | BILLABLE CODE |
| E75.27 | Pelizaeus-Merzbacher disease | BILLABLE CODE |
| E75.28 | Canavan disease | BILLABLE CODE |
| E75.29 | Other sphingolipidosis | BILLABLE CODE |
