| parent | Amino acids | LP18033-8 |
| child | Indole | LP15664-3 |
| child | Tryptophan | Amniotic fluid | Chemistry - non-challenge | LP384390-3 |
| child | Tryptophan | DBS | Chemistry - non-challenge | LP384391-1 |
| child | 3-Hydroxykynurenin | LP173725-5 |
| child | Kynurenin | LP70439-2 |
| child | Tryptophan | Body fluid | Chemistry - non-challenge | LP384392-9 |
| child | Tryptophan | Cerebral spinal fluid | Chemistry - non-challenge | LP384393-7 |
| child | Tryptophan.free | LP29129-1 |
| child | Folate & tryptophan & metabolites pattern | LP201743-4 |
| child | Tryptophan | Platelet rich plasma | Chemistry - non-challenge | LP384394-5 |
| child | Tryptophan | Serum | Chemistry - non-challenge | LP384395-2 |
| child | Tryptophan/Creatinine | LP287314-1 |
| child | Tryptophan | Serum or Plasma | Chemistry - non-challenge | LP384396-0 |
| child | Tryptophan | Urine | Chemistry - non-challenge | LP384397-8 |
| PartDisplayName | en-US | Tryptophan |
| DisplayName | en-US | Tryptophan |
LOINC Version: 2.77
FHIR