Patient resource
What your PHQ-9 score means — and what it doesn't
Clinically reviewed by Josephine W. Hazeley, PMHNP-BC on · Last updated
A PHQ-9 score measures how severe your depression symptoms have been over the past two weeks, on a scale from 0 to 27. In the study that validated it, scores of 5, 10, 15, and 20 marked rising thresholds of severity, from mild symptoms at the low end up to severe at the top (Kroenke et al., 2001). It is a screening and tracking tool — not a diagnosis, which comes from an evaluation.
If a clinic handed you a PHQ-9 number without much explanation, this is what it means and where its usefulness ends. It is one input to depression treatment in North Carolina, not the whole answer.
What the PHQ-9 measures
Nine questions, each scored from 0 to 3, mapped to the symptoms clinicians use to recognize depression: low mood, loss of interest, sleep and appetite changes, low energy, trouble concentrating, and thoughts of being better off dead, among others. The total runs from 0 to 27, and higher totals reflect more severe symptoms over the past two weeks (Kroenke et al., 2001). It was designed to be quick, so a primary-care or psychiatric visit could screen reliably in a couple of minutes.
What do the severity bands mean?
They sort symptom severity into rough tiers. The validation study set cut-points at 5, 10, 15, and 20, each one marking a higher band of severity from mild up to severe (Kroenke et al., 2001). Those bands help a clinician gauge how urgent the situation is and roughly where to start — milder scores may point toward therapy first, higher scores toward including medication sooner.
One item deserves separate mention: the PHQ-9 asks about thoughts of self-harm or being better off dead. A clinician looks at that answer directly, whatever the total, because safety is not something a sum captures.
Why isn’t a score a diagnosis?
Because a questionnaire measures symptoms; it does not explain them. A diagnosis of depression comes from a clinical evaluation that considers your history, rules out medical causes, and checks for conditions that can look like depression (NIMH). A high PHQ-9 can reflect major depression, but it can also reflect grief, a thyroid problem, a medication side effect, or the depressive phase of bipolar disorder — which is treated differently.
That is why a number alone does not set the plan. How depression is diagnosed covers what the evaluation actually looks at, including the bipolar screen a careful prescriber does before starting an antidepressant.
What is the PHQ-9 genuinely good for?
Two things. First, flagging who should be evaluated. Second, and just as valuable, tracking whether treatment is working. Scoring the same nine items at each visit turns a vague sense of “a bit better” into a measurable change, and that trend guides decisions about the dose or the medication. Clinicians call this measurement-based care, and it is how a partial response gets caught rather than mistaken for a dead end — the same logic in what happens when the first antidepressant doesn’t work.
What’s the next step?
If your PHQ-9 is elevated, or if low mood has interfered with your life for weeks regardless of any score, an evaluation is the concrete next step. It can be done by telehealth anywhere in North Carolina. Request an appointment through Get Started or call (919) 739-3808. New patients are typically seen within 1–3 business days.
If you or someone you know is in crisis, call or text 988 (Suicide & Crisis Lifeline) or call 911.