| parent | Thyroxine | LP15900-1 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --1 hours post dose levothyroxine | 90796-4 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --1 hour post XXX challenge | 12931-2 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --2 hours post dose levothyroxine | 90797-2 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --2nd specimen post XXX challenge | 12923-9 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --3 hours post dose levothyroxine | 90798-0 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --3rd specimen post XXX challenge | 12924-7 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --4 hours post dose levothyroxine | 90799-8 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --4th specimen post XXX challenge | 12925-4 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --5th specimen post XXX challenge | 12926-2 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --6 hours post dose levothyroxine | 90800-4 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --6th specimen post XXX challenge | 12927-0 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --7th specimen post XXX challenge | 12928-8 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --8th specimen post XXX challenge | 12929-6 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --9th specimen post XXX challenge | 12930-4 |
| child | Thyroxine (T4) [Mass/volume] in Serum or Plasma --baseline | 27891-1 |
| PartDisplayName | en-US | Thyroxine | Serum or Plasma | Chemistry - challenge |
LOINC Version: 2.77
FHIR