D-Dimer
D-Dimer is a protein fragment produced when a blood clot dissolves in the body. It is used to help rule out blood clotting conditions.
Category: Coagulation
Also known as: d-dimer, d dimer, ddimer, fibrin degradation products
Reference range: 0–0.5 mg/L FEU (Source: ABIM)
Standard unit: mg/L FEU
High values may indicate
High D-Dimer levels may indicate deep vein thrombosis (DVT), pulmonary embolism, disseminated intravascular coagulation (DIC), recent surgery, or active clot formation.
Low values may indicate
Low or normal D-Dimer levels help rule out active blood clotting conditions such as DVT or pulmonary embolism.
Frequently asked questions
- What is a normal D-Dimer level?
- A typical reference range for D-Dimer is 0–0.5 mg/L FEU (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is D-Dimer measured in?
- D-Dimer is most commonly reported in mg/L FEU. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do D-Dimer reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track D-Dimer over time?
- Yes. Upload results from any lab and BloodId charts your D-Dimer over time against its reference range, so you can see whether the trend is rising, falling, or stable.