C4serplscnc
Key facts at a glance
- LOINC
- 76496-9
- Short code
- C4
- Synonyms
- C4 SerPl-sCnc
- Category
- chemistry
- Sample
- serum
- Container
- Serum separator tube (SST) or red-top tube with no anticoagulant
- Units
- N/A
- Ref low
- 0.14
- Ref high
- 0.44
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Immunonephelometry
- CPT
- 86160
- SNOMED
- 67922004
- Specimen volume
- 1 mL serum (minimum 0.5 mL)
- Stability
- Room temperature: 8 hours; Refrigerated (2–8°C): 7 days; Frozen (-20°C or below): 3 months. Avoid repeated freeze-thaw cycles.
- Hemolysis max
- 50
- Lipemia max
- 100
- Icterus max
- 25
- TAT
- 4–24 hours
- Order
- routine
Reference range
Adults: 0.14–0.44 g/L (14–44 mg/dL). Reference ranges may vary slightly by laboratory and assay methodology. Pediatric values tend to be slightly lower than adult values.N/A
No special patient preparation required. Fasting is not necessary. Sample should be collected before administration of corticosteroids or immunosuppressive therapy when possible, as these may affect complement levels.
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 15, 2026. · Read our editorial policy