D-Dimer
Disclaimer: Information on this page is for educational purposes. Consult a physician to interpret your test results. Health Vault helps track biomarker trends but does not replace medical advice.
What This Test Measures
D-dimer is a fibrin degradation product elevated in thrombosis, DIC, surgery, and pregnancy.
Normal D-dimer helps exclude VTE in low pretest probability patients.
Normal Ranges
| Group | Reference Range |
|---|---|
| Men | <500 ng/mL FEU |
| Women | <500 ng/mL FEU |
| Children | <500 ng/mL |
Reference ranges may vary by laboratory and assay method.
Causes of High Levels
- DVT, pulmonary embolism
- DIC
- Surgery
- Pregnancy
- Inflammation
Causes of Low Levels
- Normal finding
Test Preparation
- Report recent surgery or immobilization
Related Biomarkers
| Biomarker | Relationship |
|---|---|
| Fibrinogen | Clot formation |
| Prothrombin Time (PT) | Coagulation |
| Platelets | Thrombosis risk |
FAQ
How often should I take this test?
For suspected VTE — once.
What should I do if my result is abnormal?
Elevated with suspicion — urgent imaging; normal may exclude VTE at low probability.
Last updated: June 2026