PHQ-9
Patient Health Questionnaire for depression screening. A validated 9-item measure.
Start AssessmentWhat is the PHQ-9?
The Patient Health Questionnaire-9 (PHQ-9) is a validated, nine-item screening tool used to assess the severity of depression based on the nine diagnostic criteria outlined in the DSM.
Developed by Kroenke, Spitzer, and Williams, the PHQ-9 is one of the most widely used instruments in clinical and research settings for measuring depression. It is in the public domain and free to use.
How It Works
Answer 9 questions about how often you've been bothered by specific symptoms over the past two weeks.
Your responses are summed to produce a severity score ranging from 0 to 27.
Receive a severity classification from None/Minimal to Severe, along with guidance on what it means.
What You'll Learn
- Your overall depression severity score
- How your symptoms compare to clinical thresholds
- Which specific symptoms are most prominent
- Whether further evaluation may be helpful
At a Glance
Ready to get started?
Take the PHQ-9 to understand your depression symptom severity and get actionable insights.
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