When to use the PHQ-9, when to use the GAD-7, and why most outpatient intakes call for both — plus how to embed them into your booking flow.
Psy Planner includes built-in PHQ-9 and GAD-7 templates that attach to your intake form. Scores are tracked over time in each client profile.
If you're building out your intake process and trying to decide between the PHQ-9 and the GAD-7, here's the short answer: for most outpatient private practice clients, use both.
That might sound like a non-answer, but it's the clinically defensible one — and once you understand why, the question of which to use first mostly resolves itself. This post walks through what each tool actually measures, where they overlap, how to choose when you genuinely can only pick one, and how to make either (or both) part of a frictionless intake flow.
The PHQ-9 (Patient Health Questionnaire–9) is a nine-item self-report tool that screens for depression and estimates symptom severity. Each item maps directly to a DSM-5 criterion for major depressive disorder — things like depressed mood, loss of interest, fatigue, sleep disturbance, and difficulty concentrating.
Clients rate how often they've experienced each symptom over the past two weeks on a 0–3 scale (not at all → nearly every day). Scores range from 0 to 27:
| Score | Severity |
|---|---|
| 0–4 | Minimal or no depression |
| 5–9 | Mild depression |
| 10–14 | Moderate depression |
| 15–19 | Moderately severe depression |
| 20–27 | Severe depression |
A score of 10 or above is the standard clinical cutoff for a positive screen — meaning the client warrants further evaluation for major depressive disorder.
One important item: question 9 asks directly about thoughts of self-harm or suicide. This makes the PHQ-9 especially valuable at intake regardless of presenting concern, because it surfaces safety considerations before the first session.
The GAD-7 (Generalized Anxiety Disorder–7) is a seven-item tool that screens for anxiety and tracks severity. It focuses on symptoms like excessive worry, restlessness, irritability, and difficulty relaxing — the core feature profile of generalized anxiety disorder.
Like the PHQ-9, it uses a 0–3 rating scale and a two-week timeframe. Scores range from 0 to 21:
| Score | Severity |
|---|---|
| 0–4 | Minimal anxiety |
| 5–9 | Mild anxiety |
| 10–14 | Moderate anxiety |
| 15–21 | Severe anxiety |
A score of 10 or above is the cutoff for a positive anxiety screen.
While the GAD-7 was originally developed to screen specifically for generalized anxiety disorder, research has shown it also has reasonable sensitivity for panic disorder, social anxiety, and PTSD — making it a useful first-pass anxiety screen even when GAD isn't the primary hypothesis.
Here's the thing that makes the PHQ-9 vs. GAD-7 question more complicated than it first appears: depression and anxiety are highly comorbid. Research consistently shows that up to 60% of people with major depression also meet criteria for an anxiety disorder at some point.
The two tools also share structural features that make paired administration feel natural to clients: same rating scale (0–3), same two-week reference period, and similar item format. Completing both back-to-back takes most clients under five minutes.
What you get from that five minutes is significant:
This is why the standard recommendation in measurement-based care is to run both at intake and every four weeks thereafter. Not because you need more data for its own sake, but because the pattern across both scores tells a richer story than either score alone.
There are real situations where running both tools isn't the right call — or where one clearly takes priority.
Lead with the PHQ-9 when:
Lead with the GAD-7 when:
Consider skipping one (or both) when:
The framing of "which assessment first" assumes you're handing a client a clipboard in the waiting room minutes before their intake session. If that's your current workflow, the sequencing question is a genuine constraint.
But there's a better approach: send the assessments before the first session, as part of the booking flow.
When a new client books through Psy Planner, your intake form — including the PHQ-9 and GAD-7 — is embedded directly in the booking process. The client completes both tools before they've even confirmed their appointment. By the time the session appears in your calendar, you have:
You walk into the first session with a clinical picture already forming. The intake conversation starts at a different level — not "tell me why you're here" but "I can see from your scores that X and Y — let's talk about what that's been like for you."
This is what it looks like in practice to use assessment as a clinical tool rather than an administrative formality.
Intake is just the first data point. The clinical value of the PHQ-9 and GAD-7 compounds when you re-administer them at regular intervals — typically every four sessions, or at the start of each month.
A few things to watch for over time:
Reliable change thresholds. For the PHQ-9, a change of 5 or more points is generally considered clinically meaningful — not just measurement noise. For the GAD-7, a 4-point shift meets the threshold for reliable change. Scores that move within these bands may reflect natural variation rather than genuine improvement.
Diverging trajectories. Occasionally you'll see a client's PHQ-9 improve while their GAD-7 holds steady, or vice versa. This is clinically significant — it often means the primary treatment target is shifting, or that comorbid symptoms that were masked early are now more visible as the presenting problem improves.
The floor effect. Clients who start at minimal scores (PHQ-9 < 5, GAD-7 < 5) don't have much room to improve on these tools, even when meaningful change is happening in therapy. For these clients, outcome tracking may need to shift to other measures — quality of life, functioning, or goal-based assessment — rather than symptom severity alone.
In Psy Planner, PHQ-9 and GAD-7 scores are tracked automatically in the client's profile and charted over time. You can show clients their own progress curve, which is itself a therapeutic tool — concrete evidence that the work is working.
| PHQ-9 | GAD-7 | |
|---|---|---|
| Measures | Depression severity | Anxiety severity |
| Items | 9 | 7 |
| Score range | 0–27 | 0–21 |
| Positive screen cutoff | ≥ 10 | ≥ 10 |
| Timeframe | Past 2 weeks | Past 2 weeks |
| Rating scale | 0–3 | 0–3 |
| Includes safety item | Yes (item 9) | No |
| Completion time | ~2–3 minutes | ~2 minutes |
| Best for | Depressive presentations, safety screening | Anxiety presentations, GAD/panic/social anxiety |
| Recommended cadence | Intake + every 4 weeks | Intake + every 4 weeks |
For a solo therapist running a general outpatient private practice, the answer is almost always: use both, at intake, before the first session.
The PHQ-9 and GAD-7 were designed to be used together. They're fast, validated, and give you a baseline picture of the two most common presentations you'll see — in under five minutes of client time. The question of which to use "first" matters far less than making sure both scores are in your hands before the session starts.
If you're not yet embedding these tools into your intake flow, that's the change worth making. Not because assessments are required — but because starting a therapeutic relationship with a concrete, shared picture of where a client is right now is simply better clinical practice.
Psy Planner includes built-in PHQ-9 and GAD-7 templates that can be attached to your intake form and administered automatically when a client books. Scores are tracked over time and visible in the client's profile alongside your session notes.
See how outcome tracking works in Psy Planner →
Written by the Psy Planner team. Psy Planner is practice management software built for therapists and psychologists in private practice.