The C4 blood test measures the C4 complement blood level.
Test Code(s): 353
Other Test Name(s): Complement Component C4c
Test Type: Blood
Test Results: Typically 4 days
The C4 blood test, also known as a C4 lab test and a complement component C4c test, measures the C4 blood level.
Complement C4 is a part of a portion of the immune system known as the complement system. Abnormal levels of C4 can be associated with autoimmune conditions like glomerulonephritis, systemic lupus erythematosis (SLE), cryoglobulinemia, or another autoimmune condition. To get a C4 blood test near you, just order online and get your blood drawn at the selected Quest Diagnostics location. Once your C4 lab report is ready, it will be available for download. As can be seen on the sample C4 lab report above, the C4 blood levels are reported as a number and can be compared against the reference ranges provided by the lab.
The complement C4 lab test is part of the lupus test panel.
What is a C4 blood test?
The C4 test measures the C4 blood level.
Why is a C4 blood test important?
The C4 complement test helps screen for autoimmune conditions like lupus.
Do I need to fast to take this test?
Fasting is not necessary.
How long does it take to get test results?
It typically takes 4 business days or less.