PTT, Activated Blood Test

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Feature	Labcorp	Quest Diagnostics
Price	$7.49	$7.49
Results in	~2 business days	~3 business days
Sample type	Blood Plasma	Blood Plasma
Require fasting	No	No

About the test

This test measures activated partial thromboplastin time (aPTT). It is used to screen for deficiencies of plasma coagulation factors and to monitor patients on heparin therapy.

Included biomarkers & Reference ranges

Biomarker	Reference range
Activated Partial Thromboplastin Time (aPTT) Measures how long it takes your blood to clot through one of its main pathways. Used to check for bleeding disorders and monitor blood-thinning medications like heparin.	—

Reference ranges vary by lab, age, and sex (M/F). Your report shows your exact range. Click any biomarker to see its optimal range and what your results mean.

Preparation

If you are receiving heparin by intermittent injection, collect your sample one hour before your next dose of heparin.

Quest Diagnostics lists no special preparation for this test.

How it works

1. Order online No referral or insurance
2. Get a requisition By email in 24–72 hours
3. Visit a draw center Bring a matching photo ID
4. Get results Securely by email

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Consultations

Not sure how to read your results? We can help.

Schedule a consultation with a Hormunity specialist. We’ll walk through every marker, interpret what it means for you, and map out the next steps for your care.

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