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Chemistry & Basic Tests
PT/INR (Prothrombin Time)
Measures blood clotting time. Used to monitor warfarin therapy and assess bleeding disorders.
CPT code
85610
Turnaround time
24–72 hours
Fasting required
No fasting needed
Collection container
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About this test
Measures blood clotting time. Used to monitor warfarin therapy and assess bleeding disorders.
How to prepare
- 1
Bring a valid photo ID to your appointment
- 2
Plan for a 15–30 minute visit