NIH Stroke Scale (NIHSS)

When it activates

Scribeable activates a calculator from the encounter. The NIH Stroke Scale (NIHSS) can activate when the transcript or pasted chart context documents any of these:

• Acute stroke presentation
• TPA/thrombectomy consideration
• Stroke severity documentation
• Post-stroke monitoring
• Stroke rehabilitation planning

Note-type scope: it activates on notes whose subject resolves to neurology, emergency medicine, critical care. A note that resolves to another subject does not carry it even when the clinician's specialty matches; a note with no resolvable subject (a generic consultation) falls back to the specialty match.

Inputs the note needs

11 inputs. Each is resolved from the transcript, the pasted chart context and charted labs; an input marked "asks you" is requested as a clarification when it is undocumented.

Scoring

11 items, 0-42 total. LOC 0-3, Questions 0-2, Commands 0-2, Gaze 0-2, Visual 0-3, Facial 0-3, Motor arm/leg 0-4 each, Ataxia 0-2, Sensory 0-2, Language 0-3, Dysarthria 0-2, Neglect 0-2.

Interpretation

0: No symptoms. 1-4: Minor. 5-15: Moderate. 16-20: Moderately severe. 21-42: Severe.

Evidence

Sources carried in Scribeable's citation registry for this calculator.

• Brott T et al. Measurements of acute cerebral infarction: a clinical examination scaleBrott et al. (NIHSS) 1989 · 1989 · NIH · link last verified 2026-03-23

How Scribeable handles it in the note

When an encounter activates the NIH Stroke Scale (NIHSS) at the mandatory tier, Scribeable resolves its inputs from the transcript, the pasted chart context and any charted labs, and asks you for a missing input you can supply before the note is finalised. Bedside-exam and separately ordered study values are not requested one input at a time; a calculator that carries a combined clarification question may still put that single question to you.

The score is computed in code from the resolved inputs, not recalled by the language model. If the draft states a NIH Stroke Scale (NIHSS) value that disagrees with the computed one, the disagreement is flagged to the second drafting pass, which is instructed to correct the score and its interpretation before you see the note.

Classified as a mandatory rule-out score: a missed result carries acute harm, so the activation filter never approves it on uncertainty.

Related calculators

• Modified Rankin Scale (mRS)Measures degree of disability and dependence after stroke or neurological event
• Fisher GradeClassifies SAH severity on CT to predict risk of cerebral vasospasm
• Hunt-Hess ScaleGrades clinical severity of subarachnoid hemorrhage to predict outcome and guide management
• ABCD2 ScoreEstimates short-term stroke risk after TIA
• FOUR Score (Full Outline of UnResponsiveness)Assesses comatose patients with greater neurological detail than GCS, including brainstem reflexes and respiration
• Canadian CT Head RuleDetermines need for CT head in patients with minor head injury (GCS 13-15) to identify clinically important brain injury

Can activate in: Emergency Medicine, Neurology, Critical Care / ICU.