What does the HAS-BLED Score measure?

It estimates the risk of major bleeding in patients taking oral anticoagulants.

How is the HAS-BLED score interpreted?

A score of 0 is low risk, 1–2 is moderate risk, and 3 or higher is high risk.

Does a high HAS-BLED score mean anticoagulation should be stopped?

No. A high score calls for regular review and correction of reversible factors, but does not by itself justify stopping anticoagulation.

Does the labile INR criterion apply to DOAC users?

It mainly applies to patients taking warfarin; its predictive value is lower for DOACs.

HAS-BLED Score (Major Bleeding Risk) | Online Free Tool

HAS-BLED Score (Major Bleeding Risk) | Online Free Tool | Elysia Tools

Examples

1. Elderly warfarin patient with several modifiable risks

Anticoagulation clinician

Background

A patient taking warfarin is over 65 and has uncontrolled hypertension, unstable INR control, and concurrent NSAID use.

Problem

Estimate the patient's HAS-BLED score and identify factors that require review.

How to use

Select Hypertension, Labile INR, Age > 65 years, and Drugs (antiplatelet / NSAID). Leave the other factors unselected.

hypertension=true; renal=false; liver=false; stroke=false; bleeding=false; labileInr=true; elderly=true; drugs=true; alcohol=false

Outcome

The calculator returns a total score of 4, categorized as high risk (≥3), supporting review of blood pressure, INR stability, and NSAID use.

2. Single risk factor in an older anticoagulated patient

Primary care clinician

Background

A patient receiving oral anticoagulation is over 65 but has no reported hypertension, renal or liver dysfunction, prior stroke, bleeding history, labile INR, relevant drugs, or excess alcohol use.

Problem

Calculate the score when age is the only selected HAS-BLED factor.

How to use

Select Age > 65 years only and leave the remaining checkboxes unselected.

hypertension=false; renal=false; liver=false; stroke=false; bleeding=false; labileInr=false; elderly=true; drugs=false; alcohol=false

Outcome

The calculator returns a total score of 1, categorized as moderate risk (1–2), with continued attention to modifiable factors.

HAS-BLED Score (Major Bleeding Risk)

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Use cases

Examples

1. Elderly warfarin patient with several modifiable risks

2. Single risk factor in an older anticoagulated patient

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