| parent | Complement | LP16404-3 |
| child | Complement C4 CH50 | LP16372-2 |
| child | Complement C4 | Body fluid | Hematology and Cell counts | LP393741-6 |
| child | Complement C4 | Pericardial fluid | Hematology and Cell counts | LP393742-4 |
| child | C4 nephritic factor | LP18261-5 |
| child | Complement C4 | Peritoneal fluid | Hematology and Cell counts | LP393743-2 |
| child | Complement C4a | LP16373-0 |
| child | Complement C4d | LP16375-5 |
| child | Complement C4 | Pleural fluid | Hematology and Cell counts | LP393744-0 |
| child | Complement C4 | Serum or Plasma | Hematology and Cell counts | LP393745-7 |
| child | Complement C4/Protein | LP285797-9 |
| child | Complement C4.functional | LP412252-1 |
| child | Complement C4 | Synovial fluid | Hematology and Cell counts | LP393746-5 |
| PartDisplayName | en-US | Complement C4 |
| DisplayName | en-US | Complement C4 |
LOINC Version: 2.77
FHIR