| Gene | Description | Location | Gene Omim Number | Disease Omim Number |
| TAZ | TAFAZZIN; TAZ | Xq28 | 300394 | 300394 |
| TCF4 | TRANSCRIPTION FACTOR 4; TCF4 | 18q21.2 | 602272 | 602272 |
| TF | TRANSFERRIN; TF | 3q21 | 190000 | 190000 |
| TNNT1 | TROPONIN T1, SKELETAL, SLOW; TNNT1 | 19q13.4 | 191041 | 191041 |
| TREX1 | 3-PRIME REPAIR EXONUCLEASE 1; TREX1 | 3p21.31 | 606609 | 606609 |
| TRIOBP | TRIO- AND F-ACTIN-BINDING PROTEIN; TRIOBP | 22q13.1 | 609761 | 609761 |
| TSC1 | TSC COMPLEX SUBUNIT 1; TSC1 | 9q34 | 605284 | 605284 |
| TSC2 | TSC COMPLEX SUBUNIT 2; TSC2 | 16p13.3 | 191092 | 191092 |
| TTDN1 | M-PHASE-SPECIFIC PLK1-INTERACTING PROTEIN; MPLKIP | 7p14 | 609188 | 234050 |
| TTN | TITIN; TTN | 2q31.2 | 188840 | 188840 |
| TTPA | TOCOPHEROL TRANSFER PROTEIN, ALPHA; TTPA | 8q13.1-q13.3 | 600415 | 600415 |
| TUBGCP6 | TUBULIN-GAMMA COMPLEX-ASSOCIATED PROTEIN 6; TUBGCP6 | 22q13.33 | 610053 | 610053 |
| TYMP | THYMIDINE PHOSPHORYLASE; TYMP | 22q13.33 | 131222 | 131222 |
| TYR | TYROSINASE; TYR | 11q14-q21 | 606933 | 606933 |