The PHQ-9 is a validated, public-domain screening questionnaire for depression symptoms, developed by Spitzer, Kroenke, and Williams. It is a screening aid, not a diagnosis — only a qualified clinician can diagnose depression.
If you are currently thinking about harming yourself or suicide, please stop and get help right now: call or text 988 (Suicide & Crisis Lifeline, US) or go to your nearest emergency room. You do not need to finish this questionnaire first.
Over the last 2 weeks, how often have you been bothered by any of the following problems?
About this tool: the PHQ-9 (Patient Health Questionnaire-9) is a validated, public-domain screening instrument widely used in primary care. Scoring: 0-4 minimal, 5-9 mild, 10-14 moderate, 15-19 moderately severe, 20-27 severe. It screens for symptom severity — it cannot diagnose depression, rule out other conditions, or replace a conversation with a clinician. See our medical disclaimer.
Understanding depression screening and the PHQ-9
Depression symptoms range widely in severity and presentation — from low mood and loss of interest to changes in sleep, appetite, and concentration. The PHQ-9 is one of the most widely validated and used depression screening tools in primary care worldwide, directly based on the diagnostic criteria clinicians use, which is part of why it's so consistently referenced in research and clinical practice.
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Frequently asked questions
Can the PHQ-9 diagnose depression?
No. The PHQ-9 is a screening tool, not a diagnostic one. It measures symptom severity over the past 2 weeks and can suggest whether further evaluation is worthwhile, but only a qualified clinician can diagnose depression after a full evaluation.
What should I do if I answered "yes" to the question about self-harm?
This matters more than your total score. Please contact the 988 Suicide & Crisis Lifeline (call or text 988 in the US, available 24/7) or go to your nearest emergency room right away. If you're outside the US, contact your local emergency number or a crisis line in your country.
What score suggests I should see a doctor?
A total score of 10 or higher is commonly used as a reasonable point to discuss results with a doctor or mental health professional — but any score, combined with symptoms affecting your daily life, is worth bringing up regardless of the number.