Prothrombin Time Test
Blood (Citrate)
Hematology
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Prothrombin Time Test Normal Reference Ranges
| Parameter | Normal Range |
|---|---|
| PT | 11–13.5 seconds |
| INR (not on blood thinners) | 0.8–1.1 |
| INR (on warfarin therapy) | Typically 2.0–3.0, depending on the condition being treated |
For patients on warfarin, the target INR range is specifically tailored to their condition, and your doctor will adjust your medication dose based on where your INR falls relative to this personalized target.
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Quick Facts
CategoryHematology
Specimen TypeBlood (Citrate)
Organ System—
Available At0 labs
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