PHQ-9 Explained: What the Depression Screening Score Means

The PHQ-9 is a 9-item questionnaire that screens for depression and scores its severity from 0 to 27. Golden Coast Rehab administers the PHQ-9 — along with the GAD-7 for anxiety — as part of intake, because it gives a structured starting point for a conversation about how depression has been showing up in someone's daily life. It is a screening tool, not a diagnosis, and one item on it deserves special attention: question 9 asks about thoughts of self-harm.

What does the PHQ-9 ask?

The PHQ-9 maps directly onto the core symptom criteria clinicians use to think about depression, which is part of why it's used so widely — a high score isn't an arbitrary number but a rough count of how many core depressive symptoms are showing up and how often. That design is also why the instrument is used both to flag a possible episode and to track whether it's improving over the course of treatment.

The nine items ask how often, over the past two weeks, a person has experienced: little interest or pleasure in doing things, feeling down or hopeless, sleep trouble, low energy, appetite changes, feeling bad about yourself, trouble concentrating, moving or speaking noticeably slower or more restlessly than usual, and thoughts that you would be better off dead or of hurting yourself in some way. Each is rated 0 (not at all) to 3 (nearly every day).

The last item, question 9, is scored like the others but is never treated like the others clinically — any answer above zero prompts a direct safety conversation, independent of the total score.

How is the PHQ-9 scored?

Add the nine item scores for a total from 0 to 27. Widely cited bands are:

• 0-4: minimal depression
• 5-9: mild depression
• 10-14: moderate depression
• 15-19: moderately severe depression
• 20-27: severe depression

As with the GAD-7, the PHQ-9 also asks a separate, unscored question about how difficult these symptoms have made daily functioning — work, home, and relationships — which adds context the raw number alone does not.

Like any screening tool, the PHQ-9 works best as a repeated measure rather than a one-time snapshot. Depression symptoms can shift week to week, and a score taken during an especially hard stretch — a loss, a job change, a health scare — may not reflect an ongoing pattern. Clinicians typically look at trends across several administrations alongside the initial score.

What happens if question 9 is answered above zero?

Any positive answer to question 9 — even "several days" rather than "nearly every day" — is a safety flag that a clinician follows up on directly, regardless of the total score. This is a screening blog post, not crisis care: if you or someone you know is having thoughts of self-harm right now, call 911, 988, or the San Diego Access and Crisis Line at (888) 724-7240. All three are available around the clock.

Does Golden Coast Rehab use the PHQ-9?

Yes. The PHQ-9 is one of the two instruments we administer directly, alongside the GAD-7. We use it at intake to structure an initial picture of depressive symptoms and periodically after that to see whether treatment is working. It never stands alone — clinical interview and history shape the actual plan of care.

Depending on severity and how much daily functioning is affected, that plan can include our partial hospitalization program or intensive outpatient program, both of which treat depression as a primary specialty mental health condition, typically for about six weeks, determined clinically.

Is a PHQ-9 score the same as a depression diagnosis?

No. A diagnosis of major depressive disorder requires a clinician to review symptom duration, rule out other causes, and talk with you directly — the PHQ-9 is one input into that process, not a replacement for it. Our screening versus diagnosis article covers this distinction across instruments. If sadness has become persistent enough that you're asking whether it's more than a hard stretch, our piece on depression versus sadness may help sort that out.

A clinician also weighs symptom duration against the PHQ-9's two-week window. Grief, a difficult diagnosis, or acute stress can produce a high score without representing an ongoing depressive episode — distinguishing the two is exactly the kind of judgment a screening tool cannot make on its own, which is why the evaluation conversation matters more than the number.