NIH Stroke Scale (NIHSS) — free guideline decision tool
Quantify acute stroke severity with the NIH Stroke Scale (NIHSS, 0–42).
Open guideline tool →Guideline-based
Implements the decision logic from published clinical guidelines.
Runs in your browser
No installation. Enter the patient's values and get a guideline recommendation instantly.
Data stays local
Nothing is uploaded. Results are for licensed clinicians only.
Common questions
What does NIH Stroke Scale (NIHSS) do?
Standardised stroke severity assessment to guide treatment and track change.
How is the result calculated?
Sum of 15 items (consciousness, gaze, fields, facial/limb motor, ataxia, sensory, language, dysarthria, extinction). 1–4 minor, 5–15 moderate, 16–20 moderate–severe, 21–42 severe.
Is this a substitute for clinical judgement?
No. All results are decision-support only, for licensed clinicians. They must be individualized to the whole patient and the latest guideline version.
Run NIH Stroke Scale (NIHSS) now
Quantify acute stroke severity with the NIH Stroke Scale (NIHSS, 0–42).
Open guideline tool →For licensed clinicians. Not a substitute for clinical judgement.