Mental health
PHQ-9
Nine-item depression symptom screen with an item 9 safety alert.
Intended population: Adults completing a two-week depressive symptom screen.
- Screening scores support an interview; they do not establish a diagnosis or determine treatment.
- Assess safety directly when there is any concern; a negative screen does not exclude suicide risk.
Over the last 2 weeks…
How often have you been bothered by any of the following problems?
Sources and scoring references
PHQ/GAD scoring manual ↗Original PHQ-9 validation ↗Implementation references reviewed October 28, 2026. Verify applicability and unusual or treatment-changing results against the linked references and local guidance.
