Home
HelpTest Code C4 C4 complement
Additional Codes
| Epic Ordering Code | LAB151 |
| NBS code | LBC03967 |
| Service code | 31921 |
Specimen Requirements
Submit the following:
| Container: |
| Yellow Top |
Processing Requirements
Allow specimen to clot for 30 mins and centrifuge within 2 hours
Specimen type: Serum
Volume: 0.5mL
Specimen Stability
| Specimen Type | Serum |
|---|---|
| Ambient | 2 days |
| Refrigerate | 2 days |
| Frozen | 3 months |
Specimen Condition
| Haemolysis | OK |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Alert/Reject |
| Others | Not applicable |
Methodology
Immunoturbidimetry
Days and Times Performed
24 hrs, TAT 1 day
Reference Interval
| Age | Male (mg/dL) | Female (mg/dL) |
|---|---|---|
| 1 – 13 yrs | 14 – 44 | 13 – 46 |
| 14 – 79 yrs | 15 – 53 | 15 – 57 |
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Acute phase protein.
Useful in screening for classic and activation of alternative complement pathway.
Aids in the determination of inherited or acquired deficiencies as well as the diagnosis of inflammatory and necrotic disorders.
Update
Last updated 16/07/2026
LOINC Code Information
4498-2
Alias
C4 COMP
Complement C4