The PHQ-9 is a 9-item scale (PHQ - Patient Health Questionnaire) for screening for depression. The PHQ-9 can be useful for assessing and monitoring depression severity.

The score can range from 0 to 27. Scores above 5, 10, or 15 represent mild, moderate, or severe depression, respectively. This quiz cannot make a medical diagnosis, but if you score 15 or higher, medical attention might be worthwhile.