PHQ-9 Test

This brief self-report measure is used to screen for the presence and severity of depressive symptoms over the past two weeks. Developed by Kurt Kroenke, Robert L. Spitzer, and Janet B. W. Williams, the PHQ-9 Test is one of the most widely used and validated depression screening instruments in primary care and mental health settings worldwide. It consists of 9 items and typically takes about 2 minutes to complete.

Why Take a PHQ-9 Test

Depression often develops gradually, making it hard to recognize when persistent low mood, fatigue, or loss of interest have crossed from a difficult period into something clinically significant. Because the nine items map directly onto the DSM-5 diagnostic criteria for major depressive disorder, this PHQ9 test provides a structured, evidence-based way to examine exactly which symptoms are present and how severe they currently are — rather than relying on a general, hard-to-quantify sense that "something feels off."

This specificity is what has made the PHQ-9 test one of the most trusted tools in both primary care and mental health practice: it can be completed quickly, scored immediately, and used consistently to track whether treatment is working over time. For someone wondering whether to seek help, a validated score often provides the clarity needed to take that step.

This PHQ 9 test is also widely used by clinicians as a routine screening measure during medical visits, since depression frequently coexists with and complicates the management of physical health conditions.

What the Assessment Measures

The PHQ-9 rates the frequency of nine core depressive symptoms over the past two weeks, each mapped directly to a DSM-5 diagnostic criterion:

• Anhedonia — little interest or pleasure in doing things that were previously enjoyable
• Depressed mood — feeling down, depressed, or hopeless
• Sleep disturbance — trouble falling or staying asleep, or sleeping too much
• Fatigue — feeling tired or having little energy
• Appetite changes — poor appetite or overeating
• Self-worth and guilt — feeling bad about oneself, or feeling like a failure
• Concentration difficulty — trouble concentrating on tasks such as reading or watching television
• Psychomotor changes — moving or speaking noticeably slower, or being unusually fidgety or restless
• Thoughts of self-harm — thoughts of being better off dead or of hurting oneself in some way

Each item is scored 0–3, yielding a total score from 0 to 27. Scores of 0–4 indicate minimal depression, 5–9 mild, 10–14 moderate, 15–19 moderately severe, and 20–27 severe depression. Any positive response to the ninth item warrants immediate follow-up regardless of the total score.

Who This Assessment Is For

This PHQ-9 Test is appropriate for any adult who wants to understand whether their current mood, energy, and functioning reflect clinically significant depressive symptoms. It is widely used in primary care, where physicians routinely screen for depression during general health visits, and by people already in treatment who want a quick, repeatable way to track whether their symptoms are improving.

Clinical Validity and Use in Practice

The PHQ-9 has been validated across thousands of studies and clinical populations and is recommended by numerous major health organizations as a standard depression screening and severity-monitoring tool. Results from this PHQ-9 test should be interpreted alongside clinical evaluation — it is a screening and severity-rating measure, not a standalone diagnostic instrument. Where scores fall in the moderate-to-severe range, or if there is any indication of thoughts of self-harm, prompt consultation with a physician or mental health professional is strongly recommended.