The short answer
Detects fibrin degradation in your blood — used to rule out blood clots like DVT or pulmonary embolism, measured from a standard blood draw. At TestWell it costs $69.99 plus a $6 lab fee, needs no fasting, and results post in 1–3 business days. Physician-authorized with no doctor's visit or insurance needed; draw at Quest or Labcorp.
Hospital Lab
$130
cash pay
Other Labs
$111
+ lab fees
TestWell
$69.99
+ $6 lab fee
D-Dimer is a small protein fragment produced when a blood clot breaks down through fibrinolysis. Elevated D-Dimer levels indicate that abnormal clotting and clot breakdown are happening somewhere in the body. The test is most often used to rule out venous thromboembolism (VTE) — including deep vein thrombosis (DVT) and pulmonary embolism (PE) — in patients with a low clinical pretest probability. A negative D-Dimer in a low-risk patient effectively excludes VTE without further imaging. D-Dimer is also used to monitor disseminated intravascular coagulation (DIC), assess recurrent VTE risk after stopping anticoagulation, and evaluate ongoing fibrinolysis. Note: D-Dimer is sensitive but not specific — it can be elevated in pregnancy, post-surgery, infection, malignancy, and aging, so an elevated result requires clinical context.
Measures fibrin degradation fragments released when a blood clot breaks down. Primarily used to help rule out venous thromboembolism — deep vein thrombosis (DVT) and pulmonary embolism (PE) — and to monitor clotting activity.
People whose clinician suggested clot rule-out monitoring, those with a personal or family history of clotting events tracking a baseline, and anyone re-checking levels after completing anticoagulation under medical guidance.
Sample Type
Blood draw
Fasting
Not required
Results In
1–3 business days
Performed At
Quest or Labcorp
Your D-Dimer results will include values for each of the 1 biomarker tested, along with reference ranges. Results are reviewed by a licensed physician before being released to your secure portal.
If any values fall outside the normal range, your report will include guidance on what that may mean and recommended next steps. You'll receive an email notification when your results are ready, typically within 1–3 business days.
Typical reference range layout
Lab reports show where your value sits relative to established reference intervals—your physician interprets this in context for you.
No fasting required. Take your normal medications. Inform the lab if you've had recent surgery, are pregnant, or have an active infection — these can elevate D-Dimer naturally.
The short answer
Situational, and safety comes first: if you have sudden leg swelling and pain, chest pain, or shortness of breath, do not order a test online - go to an emergency room now. Ordered with a provider's guidance, a D-Dimer is a useful rule-out for blood clots, but it is not a self-diagnosis tool for an acute emergency.
We would rather you order the right test than the most expensive one.
D-Dimer is a standard venous blood draw at Quest or Labcorp, or an at-home mobile draw where available. Because Quest Direct and Labcorp OnDemand do not sell D-Dimer to consumers, third-party resellers charge $111+; TestWell runs the identical Quest/Labcorp assay for $69.99. Turnaround is 1-3 business days - which is exactly why it is the wrong tool for a suspected acute clot, where you need an ER and imaging the same hour.
The markers that matter most and what an out-of-range value can mean. Reference ranges vary by lab, age and sex.
| Marker | Typical range | What it means |
|---|---|---|
| D-Dimer | Under 0.50 mcg/mL FEU (age-adjusted) | A normal (low) result makes an active clot unlikely - its strength is ruling clots out. A high result is non-specific: clots raise it, but so do infection, recent surgery, pregnancy, age, and inflammation, so an elevated value needs clinical follow-up, not panic. |
This section medically reviewed by Youmna DiStefano, MD — updated July 2026. General health information, not medical advice; interpret results with a qualified clinician.
A D-Dimer test costs $69.99 at TestWell — $75.99 all-in when ordered alone, because the $6 lab processing fee is charged once per order, with no draw fee or physician fee added. Hospital outpatient labs typically bill around $130.00 self-pay for the same test, and often more. With insurance, what you pay depends on your deductible and your plan's negotiated rate; TestWell's price is fixed before the draw and is HSA/FSA-eligible.
| Where you order | Price | One test, all-in | Notes |
|---|---|---|---|
| TestWell (drawn at Quest or Labcorp) | $69.99 | $75.99 | Includes the one $6 lab processing fee, charged once per order |
| Hospital outpatient lab, self-pay (typical) | $130.00 | $130.00 | Reference figure; hospital charges vary widely by facility and are often higher |
Lab test codes: Quest test code 8659 · Labcorp test no. 115188 · BioReference code 5743-0. Competitor prices are read from the linked public pages and re-checked regularly; the labs' sites may add taxes or change prices without notice.
Compare more: Quest Diagnostics price list · Labcorp price list · Quest vs Labcorp · Lab test price checker
Medically reviewed by Youmna DiStefano, MD · Last reviewed September 2026
TestWell Price
$69.99
+ $6 lab processing fee at checkout
No insurance needed · HIPAA compliant
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