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Fibrin D-Dimer

Published: July 27, 2026Updated: August 25, 2026

Fibrin D-Dimer measures the presence of degraded fibrin in the blood, indicating the activation of the coagulation system and fibrinolysis.

Quick summary

Fibrin D-Dimer is a marker for blood clot formation and breakdown.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
μg/mL FEU
Clinical utility
diagnostic
Result kind
quantitative
FDA-cleared
Roche D-Dimer, Abbott D-Dimer, Siemens D-Dimer, BioMerieux D-Dimer
interpretation: {"text":"0–0.5 μg/mL FEU: Blood clot formation is unlikely.","label":"Normal"}; {"text":">0.5 μg/mL FEU: Increased likelihood of blood clot formation; further evaluation is needed.","label":"Elevated"}

Fibrin D-Dimer is a protein fragment that is produced when a blood clot dissolves in the body. It is used as a diagnostic tool to detect conditions related to abnormal blood clotting, such as deep vein thrombosis (DVT), pulmonary embolism (PE), and disseminated intravascular coagulation (DIC).

Elevated levels of D-Dimer can indicate the presence of a blood clot, but it is not specific to the type or location of the clot. It is often used in conjunction with other tests to confirm a diagnosis. Normal levels of D-Dimer can help rule out the presence of significant blood clots.

The reference range for Fibrin D-Dimer is typically 0–0.5 μg/mL FEU. Levels above this range may suggest the need for further diagnostic evaluation. It is important to interpret D-Dimer results in the context of the patient's clinical presentation and other laboratory findings.

Frequently asked questions

What does a high D-Dimer level mean?
A high D-Dimer level indicates increased blood clotting and breakdown activity, suggesting the possibility of conditions like DVT, PE, or DIC.
Can D-Dimer be used to diagnose a specific type of clot?
No, D-Dimer is not specific to the type or location of the clot. It indicates the presence of clot formation and breakdown but requires additional tests for a specific diagnosis.
  1. 1
    Fibrin D-Dimer - Lab Tests OnlineSource
  2. 2
    D-Dimer Test - Mayo ClinicSource

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 25, 2026. · Read our editorial policy