HAS-BLED Score

Bleeding risk on anticoagulation in atrial fibrillation

Bleeding Risk Factors (1 pt each)

Uncontrolled Hypertension (SBP >160 mmHg)ModifiableRenal disease (dialysis, transplant, Cr >2.26 mg/dL or >200 µmol/L)Liver disease (cirrhosis, bilirubin >2× normal, ALT/AST >3× normal)Stroke historyPrior major bleeding or bleeding predispositionLabile INR (TTR <60% on warfarin)ModifiableElderly age >65Drugs: antiplatelet agents or NSAIDsModifiableAlcohol: ≥8 drinks/weekModifiable

0/9Low Bleeding Risk

Anticoagulation generally appropriate if indicated.

High HAS-BLED does not mean OAC should be withheld — stroke risk from untreated AFib usually exceeds bleeding risk. Address modifiable factors. See CHA₂DS₂-VASc.

In clinical review. This calculator follows the published score, but our clinical review hasn’t signed off on this implementation yet. Verify every result against the primary source before acting on it.

For clinical decision support only. Does not replace provider judgment. Verify all scores before acting on results.