EDSS (Expanded Disability Status Scale, MS)
Expanded Disability Status Scale (Kurtzke 1983): the ambulation grade with the eight functional-system scores → a 0–10 multiple-sclerosis disability score.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Ambulation
- Unilateral aid ~100 m (6.0)
- Pyramidal FS
- 2
- Cerebellar FS
- 0
- Brainstem FS
- 0
- Sensory FS
- 1
- Bowel & bladder FS
- 0
- Visual FS
- 0
- Cerebral FS
- 0
- Other FS
- 0
Result: EDSS 6.0 — walking aid required.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Low range
- 0–3.5 governed by the eight Functional-System grades (fully ambulatory). Simplified FS-count table; a definitive rating uses a trained Neurostatus assessment.
- Ambulation
- 4.0 ≥ 500 m no aid; 6.0 unilateral aid ~100 m; 6.5 bilateral aid ~20 m; 7.0 wheelchair; 8.0 bed/chair; 9.0 bed-bound; 10 death. The reported step is the higher of the FS and ambulation steps.
What you enter
- Ambulation
- Pyramidal FS (0–6)
- Cerebellar FS (0–5)
- Brainstem FS (0–5)
- Sensory FS (0–6)
- Bowel & bladder FS (0–6)
- Visual FS (0–6)
- Cerebral FS (0–5)
- Other FS (0–1)
How this is calculated
Kurtzke JF. Rating neurologic impairment in multiple sclerosis: an expanded disability status scale (EDSS). Neurology. 1983;33(11):1444-1452. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.