D-Dimer Quantitative Test
The D-Dimer quantitative test measures a by-product produced when the body's fibrinolytic system is activated. Quest describes it as a way to assess fibrinolytic activation and intravascular clot formation, and as valuable in helping exclude venous thromboembolism in people considered at high risk.
About this test
D-Dimer is a measurable by-product created when the body breaks down blood clots through its fibrinolytic system. Its level in the blood reflects that clot-breakdown activity, which is why Quest describes the test as a way to assess fibrinolytic activation and intravascular thrombosis.
The sample is collected in a sodium citrate tube and analyzed using an immunoturbidimetric method. Quest notes the test's particular value in helping exclude venous thromboembolism among people considered at high risk for that condition.
Who might consider this test?
- People who consider this test are often being evaluated for symptoms or risk factors related to clotting activity.
Test details
| Quest code | 8659 |
|---|---|
| Methodology | Immunoturbidimetric |
| Sample type | One full unopened 3.2% sodium citrate (light blue-top) tube |
| Collection | Quest patient service center |
Reference range
<0.50 mcg/mL FEU
Reference ranges are general guidance. The range printed on your own laboratory report is the one that applies to your result.
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Additional details
What this test looks at
The test reports the concentration of D-Dimer, a by-product of the fibrinolytic system, in a blood sample collected in a sodium citrate (light blue-top) tube. Quest also lists it simply as D-Dimer, Quantitative.
How it's often used alongside other tests
Quest describes D-Dimer testing as useful in assessing fibrinolytic activation and intravascular thrombosis, and specifically valuable in helping exclude venous thromboembolism in people considered at high risk. A clinician reads the result alongside symptoms, risk factors and other findings.
Order online and a physician order is included — no doctor's visit and no insurance needed. Your sample is collected at a Quest Diagnostics patient service center.
Laboratory results should always be interpreted by a licensed clinician who knows your health history. This page is information about a test, not medical advice.
Frequently asked questions
What does the D-Dimer test measure?
It measures the concentration of D-Dimer, a by-product produced when the body's fibrinolytic system is activated, using an immunoturbidimetric method.
How is the sample collected?
The test uses a blood sample collected in a full, unopened sodium citrate (light blue-top) tube at a Quest Diagnostics patient service center.
Do I need to prepare for this test?
No preparation instructions are listed for this test, though people follow any instructions their ordering clinician provides.
What is D-Dimer used to help evaluate?
Quest describes it as useful in assessing fibrinolytic activation and intravascular clot formation, and as valuable in helping exclude venous thromboembolism among people considered at high risk for that condition.
Can a D-Dimer result diagnose a blood clot on its own?
No. A clinician reads the result alongside symptoms, risk factors and other findings rather than relying on this test alone.
How much does the D-Dimer Quant test cost?
The cash price at Celio Health is $359. That covers the physician's order and sample collection at a Quest patient service center — no insurance is needed and there's no separate doctor's visit to pay for.