C4serplql
Key facts at a glance
- LOINC
- 48731-4
- Short code
- C4
- Synonyms
- C4 SerPl Ql
- Category
- chemistry
- Sample
- serum
- Container
- Serum separator tube (SST) or red-top tube without anticoagulant
- Units
- N/A
- Ref low
- 16
- Ref high
- 47
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- Immunonephelometry
- CPT
- 86160
- SNOMED
- 71878006
- Specimen volume
- 1 mL serum
- Stability
- Room temperature: 8 hours; Refrigerated (2-8°C): 7 days; Frozen (-20°C or below): 1 month
- Hemolysis max
- 100
- Lipemia max
- 500
- Icterus max
- 50
- TAT
- 4–24 hours
- Order
- routine
Reference range
Adult: 16-47 mg/dL; values may vary by laboratory and assay methodologyN/A
No special patient preparation required. Fasting is not necessary for complement C4 testing.
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