HAS-BLED score calculator

HAS-BLED Score

HAS-BLED Score — Bleeding Risk

Criteria	No (0)	Yes (+1)
H — Hypertension (uncontrolled SBP >160)	1
A — Abnormal renal function (dialysis, transplant, Cr >2.26) and/or liver function (cirrhosis, bilirubin >2×, AST/ALT/ALP >3×)	1	(+1 each, max 2)
S — Prior stroke	1
B — Bleeding history/predisposition	1
L — Labile INR (unstable/high, TTR <60%)	1
E — Elderly (age >65)	1
D — Drugs (antiplatelets, NSAIDs) and/or alcohol (≥8 drinks/week)	1	(+1 each, max 2)
HAS-BLED Score	/ 9

Interpretation
0–2	Low-moderate risk — Relatively low bleeding risk. Anticoagulation generally recommended if indicated.
≥3	High risk — Consider modifiable risk factors (HTN, labile INR, drugs/alcohol). Score ≥3 does NOT contraindicate anticoagulation but warrants closer monitoring.

References
Pisters R, Lane DA, Nieuwlaat 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(5):1093-1100. PMID 20299623. Note: HAS-BLED ≥3 is NOT a contraindication to anticoagulation — it identifies patients who need closer follow-up and correction of modifiable risk factors.