D-dimer level over 3,000—does it require hospitalization?

Under normal circumstances, for healthy individuals, the normal D-dimer level is less than 200 µg/L. D-dimer is a clinical marker reflecting fibrinolytic activity—the body’s ability to break down fibrin clots—and is closely associated with coagulation function. A D-dimer level exceeding 3,000 µg/L strongly suggests the presence of a coagulation-related clinical disorder. Patients with such markedly elevated levels must promptly seek medical evaluation at a hospital. Further management—including whether to initiate treatment or require hospitalization—should be determined based on the physician’s assessment and recommendations.