| Gene | Description | Location | Gene Omim Number | Disease Omim Number |
| IBA57 | IRON-SULFUR CLUSTER ASSEMBLY FACTOR IBA57; IBA57 | 1q42.13 | 615316 | 615316 |
| IDS | IDURONATE 2-SULFATASE; IDS | Xq28 | 300823 | 300823 |
| IDUA | ALPHA-L-IDURONIDASE; IDUA | 4p16.3 | 252800 | 252800 |
| IKBKAP | ELONGATOR COMPLEX PROTEIN 1; ELP1 | 9q31 | 603722 | 603722 |
| INSR | INSULIN RECEPTOR; INSR | 19p13.2 | 147670 | 147670 |
| ITPA | INOSINE TRIPHOSPHATASE; ITPA | 20p | 147520 | 147520 |