Clotting
D-Dimer
What it means
A protein fragment left after a clot breaks down. High levels can suggest deep-vein thrombosis, pulmonary embolism, or recent surgery.
Typical normal range
<500 ng/mL
Reference ranges vary by lab, age, sex, and pregnancy. Always check the range on your own report.
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Related terms in Clotting
This is a plain-language explanation for patients, not clinical advice. AI can be wrong. Always confirm with your doctor.