Blood Clotting Test
Apr 16, 2026
Blood Clotting Test
A blood clotting test (coagulation screen) measures how well your blood forms clots—using markers like PT (prothrombin time), INR, APTT, fibrinogen, and D-dimer to detect clotting disorders, monitor anticoagulant therapy (warfarin), investigate excessive bleeding or bruising, and assess clot risk. Both insufficient clotting (bleeding risk) and excessive clotting (thrombosis risk) are important to identify.
At Blood Test London, clotting tests cost from £265 with results in 2-3 days. A doctor always reviews every result.
What Clotting Tests Measure
Marker | What It Shows | Normal Range |
|---|---|---|
PT (Prothrombin Time) | Extrinsic pathway | 10-14 seconds |
INR | Standardised PT | 0.9-1.1 (2-3 on warfarin) |
APTT | Intrinsic pathway | 25-35 seconds |
Fibrinogen | Clotting protein | 1.5-4.0 g/L |
D-dimer | Recent clotting activity | Below 500 ng/mL |
When to Test
Easy bruising
Prolonged bleeding after cuts
Family history of clotting disorders
Before surgery
On warfarin or other anticoagulants
Suspected blood clot (DVT, PE)
Recurrent miscarriage
Unexplained clots
Our Clotting Test Options
Basic Coagulation Screen - £265
PT, INR, APTT
Doctor review
Comprehensive Clotting Panel - £345
Full coagulation screen
Fibrinogen
D-dimer
Detailed interpretation
Book Your Test
Price: From £265
Results: 2-3 days
Doctor review: A doctor always reviews every result
Book via WhatsApp | Phone: 020 3951 3429
Blood Test London by The Wellness. Blood clotting testing from £265. A doctor always reviews every result.