Hoehn & Yahr Parkinson Disease Staging
Hoehn & Yahr stage (1967, modified): the Parkinson-disease motor stage 0-5, including the 1.5 and 2.5 modified half-stages.
Open the calculator → Runs in your browser. Data leaves only if you deliberately send a problem report from the interactive tool.
Example
- Hoehn & Yahr stage
- 2.5 — Mild bilateral, recovers on pull test (modified)
Result: Hoehn & Yahr stage 2.5 (modified scale): mild bilateral disease with recovery on the pull test.
The tool opens with these values already filled in. Replace them with your own.
What the result means
- Original 1–5
- 1 unilateral; 2 bilateral, no balance loss; 3 postural instability, independent; 4 severe, walks unaided; 5 wheelchair/bedridden unless aided.
- Modified
- adds 0 (no disease), 1.5 (unilateral + axial), 2.5 (mild bilateral, recovers on pull test).
What you enter
- Hoehn & Yahr stage
How this is calculated
Hoehn MM, Yahr MD. Parkinsonism: onset, progression and mortality. Neurology. 1967;17(5):427-442. Read the source ↗
A reference and educational tool. Not medical, legal, or financial advice, and not a substitute for clinician judgment.