About the PHQ-9
Learn more about this depression screening tool and how to interpret your results.
What is PHQ-9?
The Patient Health Questionnaire (PHQ-9) is a 9‑item self‑administered screening tool that aligns with DSM‑5 criteria for major depressive disorder. It is widely used in clinical and research settings to detect depression, assess its severity, and monitor treatment progress.
Why It Matters
Depression affects millions worldwide, often going undiagnosed. Early identification using the PHQ-9 can lead to timely support, reducing the risk of long‑term impairment. It helps both patients and providers track changes over time and make informed decisions about care.
How to Use
Simply answer each of the nine questions based on how often you have experienced the symptom over the last two weeks. The options range from "Not at all" (0 points) to "Nearly every day" (3 points). After answering all questions, click "Calculate Score" to see your total score and a general interpretation.
Interpreting Your Results
Your total score indicates the probable severity of depression:
- 0–4 Minimal depression – no action needed typically.
- 5–9 Mild depression – watchful waiting, consider follow‑up.
- 10–14 Moderate depression – develop a treatment plan.
- 15–19 Moderately severe depression – active treatment recommended.
- 20–27 Severe depression – immediate treatment often necessary.
The calculator also provides a general recommendation based on your score. However, these are only guidelines. A complete evaluation by a mental health professional is essential for an accurate diagnosis and treatment plan.
Important Considerations
- This tool is not a substitute for professional medical advice, diagnosis, or treatment.
- If you are experiencing thoughts of self‑harm or suicide, please contact a crisis hotline or emergency services immediately.
- The PHQ-9 is a screening tool; it cannot confirm a diagnosis. Many factors (e.g., physical illness, medication side effects) can influence scores.
- Always discuss your results with a qualified healthcare provider who can interpret them in the context of your overall health.
- Results are stored locally in your browser for your convenience; no data is sent to our servers.
Take care of your mental health — you are not alone.