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Patient Health Questionnaire-9 (PHQ-9)

A widely used 9-item screening measure for symptoms of depression over the past two weeks. A screener, not a diagnosis.

Length
9 items, about 3 minutes
What you get
1 scored scale, with bands and an optional AI narrative report
Licence & provenance
Public domain. Developed by Spitzer, Williams, Kroenke and colleagues; free to reproduce and use.
Citation
Kroenke, K., Spitzer, R. L., & Williams, J. B. (2001). The PHQ-9: validity of a brief depression severity measure. Journal of General Internal Medicine, 16(9), 606–613.

Before you start

  • Your answers are saved so we can score them and show your results.
  • Only you can see them, in this browser on this device.
  • We keep them for up to 180 days. You can delete them at any time from your results page.
  • If you choose an AI report, your computed scores (never your individual answers) are sent to Anthropic, our AI provider in the USA, to write it.
  • No one reviews your answers in real time. If you need help now, use urgent support, not a questionnaire.
  • You can stop at any time. Results are educational — never a diagnosis.

Full details in the privacy notice.