| parent | Thyroxine | LP15900-1 |
| child | Thyroxine/Triiodothyronine uptake index | Serum or Plasma | Chemistry - non-challenge | LP381525-7 |
| STATUS | ACTIVE |
| PartDisplayName | en-US | Thyroxine/Triiodothyronine uptake index |
| DisplayName | en-US | Thyroxine/Triiodothyronine uptake index |
LOINC Version: 2.81