If you have ever filled out a clipboard at a doctor's office that asked you how often, over the past two weeks, you have felt "down, depressed, or hopeless" — you have taken the PHQ-9. It is the most widely used depression screening instrument in the world, used in primary care clinics, hospitals, research studies, and increasingly online.
This guide walks through what the PHQ-9 actually is, where it comes from, what your score means, the ethical debate over whether to keep its final question, and how to use the tool well — including what it can and cannot tell you.
Where the PHQ-9 Comes From
The Patient Health Questionnaire-9 was developed in the late 1990s by Drs. Kurt Kroenke, Robert Spitzer, and Janet Williams. Spitzer was already one of the most influential figures in modern psychiatric diagnosis — he was the chair of the task force that produced DSM-III in 1980, the document that introduced the criteria-based approach to mental disorders that the field still uses today. He and his colleagues wanted a tool that primary care physicians could actually use in a busy practice.
What they built was clever in its simplicity. The PHQ-9 takes the nine symptoms that DSM lists as the criteria for a major depressive episode, turns each one into a question, and asks the patient how often they have experienced it over the past two weeks. You answer each item on a four-point scale from "Not at all" to "Nearly every day," with values from 0 to 3. Add them up and you get a total score between 0 and 27.
The validation paper was published in the Journal of General Internal Medicine in 2001, and over the next two decades the PHQ-9 became standard. It has been translated into more than 80 languages, validated across hundreds of studies, and integrated into electronic health records in the US, the UK, Australia, and dozens of other countries.
What the Nine Items Are
Each item asks how often, over the past two weeks, you have been bothered by:
- Little interest or pleasure in doing things (anhedonia)
- Feeling down, depressed, or hopeless (depressed mood)
- Trouble falling or staying asleep, or sleeping too much (sleep disturbance)
- Feeling tired or having little energy (fatigue)
- Poor appetite or overeating (appetite change)
- Feeling bad about yourself, or that you are a failure (worthlessness/guilt)
- Trouble concentrating on things (cognitive symptoms)
- Moving or speaking so slowly that other people could have noticed, or the opposite — being so fidgety or restless (psychomotor changes)
- Thoughts that you would be better off dead, or of hurting yourself in some way (suicidal ideation)
If you read DSM-5's criteria for major depressive disorder, you will see these are essentially a translation of the diagnostic checklist into self-report form. Items 1 and 2 capture the two "cardinal" symptoms — one of which must be present for a diagnosis. The other seven map onto the remaining DSM symptoms, with the requirement that at least five total symptoms be present, including at least one cardinal one, for at least two weeks.
That is what gives the PHQ-9 its clinical credibility: it is not just a list of "things depressed people feel." It is a structured measurement of the actual DSM criteria.
What the Score Means
Scores range from 0 to 27, with cutoffs established in the original validation study:
- 0–4: Minimal depression. Your symptoms, if any, are below the level associated with a depressive disorder. Many people without depression score in this range during stressful weeks.
- 5–9: Mild depression. Some symptoms are present and worth noticing, but most people in this range improve with self-directed changes (sleep, exercise, social connection) or watchful waiting.
- 10–14: Moderate depression. This is the threshold most clinicians use to recommend formal evaluation. A 2007 meta-analysis by Manea, Gilbody, and McMillan found that a cutoff of 10 has roughly 88% sensitivity and 88% specificity for detecting major depressive disorder.
- 15–19: Moderately severe depression. Current treatment guidelines support active intervention at this level — typically psychotherapy, medication, or both.
- 20–27: Severe depression. Depression at this level is unlikely to lift without help. The most important step is to connect with a professional, even if it feels hard to do so.
It is worth being clear about what these cutoffs are. They are not diagnostic. A score of 14 does not mean you have moderate depression as a diagnosis. It means your responses are similar to those of people who, on full clinical evaluation, were found to have moderate depression. That distinction matters — only a qualified clinician can rule out other conditions that share symptoms (more on that in a moment).
Why Some Sites Remove Item 9 — and Why That Is Misleading
Item 9 asks about thoughts of being better off dead or of hurting yourself. Some online versions of the PHQ-9 cut this question to create a shorter form. They will sometimes call this the PHQ-8, or just present an "8-item depression screener" without flagging the change.
There is a legitimate version of this called the PHQ-8, developed by Kroenke and colleagues in 2009. But it was designed for a very specific purpose: population epidemiology surveys conducted by telephone, where the interviewer might not be in a position to follow up if someone endorsed suicidal thoughts. In that narrow research context, removing Item 9 makes sense.
For an online self-screener, removing Item 9 makes no sense. It changes the instrument. The score-to-severity mapping that has been validated in thousands of studies is for the PHQ-9, not for an 8-item subset. And it removes what is arguably the single most clinically important question a screener can ask.
If you are taking a depression screening tool online, look for whether Item 9 is included. If it is not, ask yourself why a tool would skip the most important question.
How to Take the PHQ-9 Honestly
The PHQ-9's accuracy depends on honest self-report. A few things help.
Anchor each question in the past two weeks. Not "in general." Not "in your life." The past two weeks specifically. Depression severity moves over time, and the screener is calibrated to that window.
Read each option carefully. "Several days," "more than half the days," and "nearly every day" are different. People sometimes default to the middle option out of caution; that produces inflated or deflated scores depending on what is actually happening.
Do not adjust your answers for what you think you "should" feel. The screener is not a test you pass or fail. It is a measurement.
Take it more than once if your situation is changing. The PHQ-9 is good at tracking change over time. A score that moves from 16 to 8 with treatment is a meaningful signal. So is a score that moves from 6 to 14 over a stressful month.
What the PHQ-9 Cannot Tell You
A high score on the PHQ-9 strongly suggests that a clinical evaluation is worthwhile, but the tool has limits.
It cannot distinguish unipolar from bipolar depression. The symptoms during a depressive episode are the same in major depression and bipolar disorder, but the treatments differ significantly. A clinician will ask about past periods of unusual energy, decreased need for sleep, or impulsive behavior to assess for bipolarity.
It cannot rule out medical causes. Hypothyroidism, anemia, low vitamin D, certain medications, and chronic illness can all produce symptoms that overlap with depression. A primary care doctor will typically run basic labs before concluding that what you have is depression.
It cannot distinguish depression from grief, burnout, or PTSD. These conditions can produce similar PHQ-9 scores but call for very different responses.
It cannot account for cultural or contextual factors. Depression presents differently across cultures. Symptoms like guilt that the PHQ-9 weights heavily may be less prominent in some cultural contexts, while somatic symptoms may be more so.
A qualified clinician evaluates these things; a screener cannot.
What to Do With Your Result
If your score is 0–4: Probably continue what you are doing. Maybe check in again in a few weeks if life circumstances change.
If your score is 5–9: This is the range where small interventions can matter a lot. Prioritize sleep, daylight, and movement. Reconnect with one person you have been avoiding. If symptoms persist for several more weeks, a conversation with your doctor or a therapist is a reasonable next step.
If your score is 10 or above: Make an appointment with a primary care doctor or a therapist within the next week or two. You do not need to have figured out what is wrong before you go. Bring your PHQ-9 score — clinicians are familiar with it, and it gives them a useful starting point.
If your score is 20 or above, or if you answered anything other than "Not at all" on Item 9: Please reach out today. To a doctor, a therapist, a crisis line, or a trusted person who can help you make the call. In the US, you can call or text 988 for the Suicide & Crisis Lifeline, or text HOME to 741741. You do not have to do this alone.
A Note on Online Screening
The PHQ-9 was designed for clinical use, where a person sitting in front of you can follow up. Using it as a self-screener online is fundamentally different. The score you get tells you something — but it is not a diagnosis, and the most important thing a screener can do online is to connect you to real help when the score warrants it.
That is what this site is designed to do. The screener is the standard PHQ-9, complete with Item 9, with crisis resources integrated directly into the quiz and the result page rather than buried in a footer. The point is not just to give you a number. The point is to make sure that, if you need to talk to someone, you know how to reach them.
Take the PHQ-9 here. It takes about two minutes.