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Quest Diagnostics

Bleeding & thrombosis

Laboratory blood testing, together with a patient exam and medical history, is vital to correctly diagnosing bleeding and/or thrombotic disorders. Quest Diagnostics has a large, highly advanced test menu for these blood conditions.

Tests for bleeding disorders and thrombosis serve many functions, most notably detecting hemostasis defects and thrombosis risk, monitoring anticoagulant therapy, evaluating thrombotic conditions, and investigating the cause of abnormal PT and aPTT test results. Quest testing can be enhanced with consultative reports, interpretations, FAQs, and expert insight.

COVID-19 and coagulopathy

There is a growing body of evidence of a high prevalence of blood clots, strokes, heart attacks, and organ failures among patients infected with SARS-CoV-2 (COVID-19).1 Consider monitoring platelet count, PT/aPTT, D-Dimer, and fibrinogen. Continued monitoring of patients postdischarge is suggested for patients on extended prophylaxis.2

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Testing portfolio

  • Bleeding profiles and screening tests
  • von Willebrand disease
  • Factor assays and inhibitors
  • Anticoagulant therapy
  • HIT, TTP, and platelet studies
  • Fibrinolysis and markers of thrombin generation
  • Thrombotic risk markers and profiles–inherited
  • Antiphospholipid antibody and lupus anticoagulant
  • Women’s health
  • D-Dimer: D-Dimer is one of the measurable by-products of activation of the fibrinolytic system. Quantitation of D-Dimer assesses fibrinolytic activation and intravascular thrombosis. D-Dimer is of particular value in excluding the diagnosis of venous thromboembolism among patients at high risk.
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The power of Quest

Innovative solutions

Our highly specialized competencies in hematopathology, solid tumor pathology, dermatopathology, and hereditary cancer screening are empowered by our extensive network of subspecialized pathologists and advanced diagnostic capabilities.

Better outcomes

Advanced testing. Accessible expertise. Industry-leading pathologists. We have one of the broadest specialty menus in the industry, along with medical experts available to consult on test results so you get answers you can trust to provide the superior care your patients deserve.  

Improved experiences

With our robust comprehensive test menu of more than 3,500 oncology tests, you can spend your time caring for patients instead of searching for additional vendors to provide your testing solutions.

The right price

We remove barriers to comprehensive care by improving patient access with comprehensive financial assistance programs and uninsured patient pricing.

References

  1. Varga Z, Flammer AJ, Steiger P, et al. Endothelial cell infection and endotheliitis in COVID-19. Lancet. 2020;395(10234):1417-1418. doi:10.1016/S0140-6736(20)30937-5

  2. Bikdeli B, Madhavan MV, Jimenez D, et al. COVID-19 and thrombotic or thromboembolic disease: implications for prevention, antithrombotic therapy, and follow-up: JACC state-of-the-art review. J Am Coll Cardiol. 2020;75(23):2950-2973. doi:10.1016/j.jacc.2020.04.031


This information is provided for informational purposes only and is not intended as medical advice. A physician’s test selection and interpretation, diagnosis, and patient management decisions should be based on his/her education, clinical expertise, and assessment of the patient.

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About our tests

Our company

Quest® is the brand name used for services offered by Quest Diagnostics Incorporated and its affiliated companies. Quest Diagnostics Incorporated and certain affiliates are CLIA-certified laboratories that provide HIPAA-covered services.  Other affiliates operated under the Quest® brand, such as Quest Consumer Inc., do not provide HIPAA-covered services. 

 

Quest®, Quest Diagnostics®, any associated logos, and all associated Quest Diagnostics registered or unregistered trademarks are the property of Quest Diagnostics. All third-party marks—® and ™—are the property of their respective owners. © 2025 Quest Diagnostics Incorporated. All rights reserved. Image content features models and is intended for illustrative purposes only.