Fasting Required: No

Specimen: Blood

Lab: Quest Diagnostics

Results: 1-2 business days

Note: Result turnaround times are an estimate and are not guaranteed. Our reference lab may need additional time due to weather, holidays, confirmation/repeat testing, or equipment maintenance.

Limitations: In patients with low or moderate probability of clots in the deep veins of the leg, a negative D-Dimer result generally rules out DVT. Some patients with blood clots will be false-negatives. This is most common among older patients, those who have undergone prolonged hospitalization, and those with markedly elevated C-reactive protein levels.

Description: D-dimer is a protein fragment that is produced when a blood clot dissolves in the body.

Alternate Name(s): Fragment D-dimer, Fibrin Degradation Fragment