Cardiology
HAS-BLED score
HAS-BLED estimates major bleeding risk in a person on anticoagulation for atrial fibrillation. Its purpose is to find modifiable risk factors, not to withhold anticoagulation.
Enter the values
Result
0/ 9
Low
Bleeding risk is not raised enough to change an otherwise indicated anticoagulation decision. Review the modifiable items regardless.
- Modifiable items to address
- None flagged
This calculator is provided for reference and education. It does not replace clinical assessment, examination, current guidelines, local protocol, or professional judgment. Verify every result before acting on it. Nirogix accepts no liability for clinical decisions made using this tool.
The formula
- One point for each of the nine criteria. Range 0 to 9.
Worked example
Uncontrolled hypertension, age 70, and aspirin alongside warfarin: 1 + 1 + 1 = 3, a high score
When to use it
- Before starting anticoagulation, alongside CHA₂DS₂-VASc
- At periodic review of a patient already anticoagulated
And when not to
- A high HAS-BLED is a prompt to fix modifiable risks and review more often, not a reason to withhold anticoagulation from a patient at high stroke risk.
- Several items are only assessable in a patient already on warfarin (labile INR).
References
- A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding — Pisters R et al., Chest, 2010
Last reviewed 07/09/2026.
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These calculators are free and always will be. We also build Nirogix, a hospital management system for Indian clinics and hospitals. The same calculations are planned inside the consultation record, pre-filled from the chart.