High D-dimer: what it means
A D-dimer result above the normal range is considered high. Here is what a raised D-dimer can point to, and when it is worth discussing with a doctor.
Reference range: <500 ng/mL FEU; rises with age (age × 10 over 50)
Understand your full resultWhat a high D-dimer can mean
- Venous thromboembolism — pulmonary embolism, deep-vein thrombosis; the clinical reason the test exists.
- Disseminated intravascular coagulation (DIC) — sepsis, obstetric emergencies; markedly elevated.
- Recent surgery, trauma, burns — acceptable to be high days to weeks afterwards.
- Pregnancy — rises through gestation; pregnancy-trimester thresholds exist.
- Cancer — chronically raises baseline.
- COVID-19, severe infection — non-specific elevation; not necessarily a clot.
- Acute aortic dissection — typically very high.
When to discuss with a doctor
D-dimer is not a screening test for healthy patients. It is ordered when there is acute suspicion of VTE — sudden breathlessness, leg swelling, pleuritic chest pain — and a structured pre-test probability score has been calculated. If your D-dimer was ordered in an emergency setting and came back positive, an imaging study (CT-PA or compression ultrasound) is the next step, not self-interpretation. Mediora.AI shows the value with reference range; clot diagnosis is an emergency-medicine call.
Conditions this can relate to
Keep reading
One value is a snapshot. Upload the full test to see every marker explained together.
Upload your test - freeMediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.