| parent | Renal function | LP31398-8 |
| child | Urea nitrogen | Amniotic fluid | Chemistry - non-challenge | LP385452-0 |
| child | Urea nitrogen | Blood | Chemistry - non-challenge | LP385453-8 |
| child | Urea nitrogen renal clearance | LP174099-4 |
| child | Urea nitrogen comment | LP19421-4 |
| child | Urea nitrogen | Blood arterial | Chemistry - non-challenge | LP385454-6 |
| child | Urea nitrogen | Blood peripheral | Chemistry - non-challenge | LP385455-3 |
| child | Urea nitrogen/Creatinine | LP287338-0 |
| child | Urea nitrogen peritoneal dialysis clearance/1.73 sq M | LP287336-4 |
| child | Urea nitrogen | Blood venous | Chemistry - non-challenge | LP385456-1 |
| child | Urea nitrogen | Body fluid | Chemistry - non-challenge | LP385457-9 |
| child | Urea nitrogen/body weight | LP287337-2 |
| child | Urea nitrogen | Cerebral spinal fluid | Chemistry - non-challenge | LP385458-7 |
| child | Urea nitrogen | Dialysis fluid | Chemistry - non-challenge | LP385459-5 |
| child | Urea nitrogen | Dialysis fluid peritoneal | Chemistry - non-challenge | LP385460-3 |
| child | Urea nitrogen | Gastric fluid | Chemistry - non-challenge | LP385461-1 |
| child | Urea nitrogen | Peritoneal fluid | Chemistry - non-challenge | LP385462-9 |
| child | Urea nitrogen | Pleural fluid | Chemistry - non-challenge | LP385463-7 |
| child | Urea nitrogen | Serum or Plasma | Chemistry - non-challenge | LP385464-5 |
| child | Urea nitrogen | Synovial fluid | Chemistry - non-challenge | LP385465-2 |
| child | Urea nitrogen | Urine | Chemistry - non-challenge | LP385466-0 |
| child | Urea nitrogen | Vitreous fluid | Chemistry - non-challenge | LP385467-8 |
| PartDisplayName | en-US | Urea nitrogen |
| DisplayName | en-US | Urea nitrogen |
LOINC Version: 2.77
FHIR