Serum or plasma concentration of D-dimer measured by immunoassay (clia/tmb-based)
This test measures the level of D-dimer, a protein fragment produced when blood clots break down. It helps assess whether you may have a blood clot in your veins or arteries.
["D-dimer helps identify potential blood clot risks or confirm clot resolution after treatment."]
Key facts at a glance
- LOINC
- 92792-1
- Short code
- CDUBNAA
- Synonyms
- C dubliniensis DNA Bld Pos Ql NAA+probe
- Category
- chemistry
- Sample
- whole-blood
- Container
- Positive blood culture broth bottle (e.g., aerobic, anaerobic, or pediatric blood culture bottle) or sterile screw-cap transport tube
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- ≥ 0 years
- Method
- probe-amp-tar
- CPT
- 87798
- SNOMED
- 122450005
- Specimen volume
- 0.5-2 mL aliquot from positive blood culture bottle
- Stability
- Ambient: 24 hours; Refrigerated (2-8°C): 7 days; Frozen (-70°C or below): 30 days
- Hemolysis max
- 0
- Lipemia max
- 0
- Icterus max
- 0
- TAT
- 4–24 hours
- Order
- routine
What Is D-Dimer Used For?
Doctors use D-dimer testing primarily to diagnose or evaluate conditions involving abnormal blood clotting, such as deep vein thrombosis (DVT) or pulmonary embolism. It can also help determine if a clot has dissolved naturally or if further treatment is needed.
How Is the Sample Collected?
A blood sample is drawn from a vein, usually in your arm. The blood is processed to separate serum or plasma for testing. This process is quick and typically done in a lab setting.
What Does a Positive or Negative Result Mean?
A negative D-dimer result strongly suggests there is no active blood clot in your body. However, a positive result does not definitively confirm a clot—it may indicate other conditions or require further testing. Your doctor will interpret results in the context of your symptoms and medical history.
How Is This Test Performed?
The test uses a highly sensitive immunoassay method to detect D-dimer fragments in your blood. This method involves specific antibodies that bind to D-dimer, triggering a measurable reaction to confirm its presence.
Reference range
Negative (Not Detected) for Candida dubliniensis DNAN/A
No fasting required. Specimen should be collected aseptically from a positive blood culture bottle flagged by the blood culture instrument. Avoid contamination during collection.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
D-dimer is a key marker for diagnosing venous thromboembolism (VTE), such as DVT or pulmonary embolism. While a negative result reduces suspicion of clots, a positive result often prompts additional imaging or tests to confirm or rule out clotting disorders. It is not a standalone diagnostic test but is useful in narrowing down possible causes of symptoms like leg swelling, chest pain, or unexplained shortness of breath.
Short name
D-Dimer Screening
Frequently asked questions
Why might my doctor order this test?
What are the possible side effects of this test?
How soon will I get my results?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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