C4 Blood Test

The C4 blood test measures the C4 complement blood level.

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C4 Blood Test FAQ

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.

What type of specimen will I submit?

This C4 Blood Test is a blood test.

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.

Accesa Labs does not provide medical advice, diagnosis or treatment. All users should consult with a medical provider for specific health concerns.

Last updated on June 1, 2018

C4 Blood Test for $119

C4 Test - More Information

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 often ordered with the C3 blood test, both of which are part of the lupus test panel.

C4 Blood Test at Guaranteed Prices.
Our C4 Blood Test price includes the following:
  • A doctor's lab order
  • 24 / 7 order processing
  • Access to 1000+ Quest labs
How It Works
1. Order Online
No separate office visit required.
2. Visit Lab
Get tested at a lab near me.
3. Receive Results
Get electronic results securely.