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HAS-BLED: bleeding risk on anticoagulation

Cardiovascular

Flags modifiable bleeding risks. A high score means fix the risks and review more often, not withhold anticoagulation.

What you enter

  • Hypertension (SBP >160) (+1)
  • Abnormal renal function (dialysis, transplant, Cr >200 µmol/L) (+1)
  • Abnormal liver function (cirrhosis or bili >2× / transaminases >3×) (+1)
  • Stroke history (+1)
  • Bleeding history or predisposition (+1)
  • Labile INR (if on warfarin) (+1)
  • Elderly (>65) (+1)
  • Drugs (antiplatelet, NSAID) (+1)
  • Alcohol ≥8 drinks/week (+1)
FORMULAOne point each: H, A (renal), A (liver), S, B, L, E, D (drugs), D (alcohol)
SourcePisters R et al. A novel user-friendly score (HAS-BLED) to assess 1-year risk of major bleeding in patients with atrial fibrillation. Chest 2010;138:1093-100ReviewedFormula and thresholds checked against the source on 2026-08-22. If the source updates, this line will say so.