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D-dimer with rapid immunoassay (qualitative) in plasma

Published: August 9, 2026Updated: August 16, 2026

This test measures the presence of D-dimer, a breakdown product of clotted blood, to help assess whether you may have a blood clot.

Quick summary

["Quick check for potential blood clots with a simple blood test result."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
75223-8
Short code
DENV IgG+IgM SerPlBld IA.rapid
Synonyms
DENV IgG+IgM SerPlBld IA.rapid
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia-rapid
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What Is D-Dimer?

D-dimer is a protein fragment that forms when blood clots dissolve naturally in your body. Elevated levels can suggest recent clot formation, which may be linked to conditions like deep vein thrombosis (DVT) or pulmonary embolism. This test is often used to rule out these conditions when other symptoms or test results are present.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like leg swelling, chest pain, shortness of breath, or a history of blood clots. It may also be used as part of a screening or diagnostic workup for certain medical conditions.

How Is the Test Done?

A small amount of blood is drawn from a vein in your arm. The blood is processed to separate plasma, where the D-dimer levels are measured using a rapid immunoassay method. Results are typically available within minutes.

What Are the Results?

The test result is qualitative (positive or negative) rather than a numerical value. A positive result means your body has likely experienced clot formation, while a negative result suggests no significant clotting activity.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

D-dimer (qualitative)

Frequently asked questions

How does D-dimer help doctors?
D-dimer helps doctors determine if you have a high likelihood of having a blood clot. A negative result can reduce the need for further imaging or tests, while a positive result may prompt additional evaluation to confirm or rule out conditions like DVT or pulmonary embolism.
What does a positive result mean?
A positive D-dimer result indicates that your body has likely broken down clots, which may suggest recent clot activity. However, it does not confirm the exact cause or location of the clot. Your doctor will consider this result alongside other symptoms, tests, and medical history to guide further care.
Can D-dimer levels change over time?
Yes, D-dimer levels can fluctuate depending on whether you have active clotting or clot breakdown. If you have a known condition affecting clotting, like pregnancy or certain medications, your levels may also vary. Follow-up testing may be needed to monitor changes over time.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

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 16, 2026. · Read our editorial policy