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Depression Screening
Reviewed by Medicinsk Expert•Last updated: 2026-10-22•Lab Tests

Depression Screening

Depression screening uses a standard set of questions to help health care providers identify and diagnose depression early, which can lead to faster recovery.

Overview

Depression is a serious mental health condition that affects how you think, feel, and behave. Unlike normal sadness or grief, depression can make it difficult to function at home or work. Medical experts recommend that everyone starting at age 12 receive routine depression screening.

What is it used for?

Screening helps diagnose depression, determine its severity, and identify the specific type, such as:

  • Major depression: Symptoms last at least two weeks and interfere with daily life.
  • Persistent depressive disorder (dysthymia): Less severe but longer-lasting symptoms (at least two years).
  • Seasonal affective disorder (SAD): Depression related to changes in seasons and sunlight.
  • Postpartum/Perinatal depression: Depression occurring during or after pregnancy.

Why do I need depression screening?

You may be screened during a routine checkup or if you exhibit signs such as:

  • Loss of interest in activities you once enjoyed.
  • Persistent feelings of sadness, guilt, or worthlessness.
  • Changes in sleep, appetite, or energy levels.
  • Trouble concentrating or making decisions.
  • Thoughts of suicide or self-harm.

If you are thinking about suicide or hurting yourself, get help immediately: Call or text 988 (National Suicide and Crisis Lifeline) or contact your local emergency services.

What happens during screening?

You will answer a standard set of questions regarding your mood, sleep, energy, and stress levels. There is no lab test to diagnose depression, but your provider may order blood tests to rule out other conditions, such as thyroid disease or anemia, that could be causing your symptoms.

Mental Health Professionals

If you are diagnosed with depression, your provider may refer you to a specialist:

  • Psychiatrists: Medical doctors who can diagnose, treat, and prescribe medication.
  • Psychologists: Professionals who provide counseling and therapy (usually cannot prescribe medication).
  • Psychiatric Nurses: Nurses with specialized training in mental health who may provide therapy or prescribe medication in some states.
  • Licensed Clinical Social Workers/Counselors: Professionals trained in mental health therapy who work with other providers to manage care.

Frequently Asked Questions

screening tool, such as the PHQ-9, is a questionnaire used to identify individuals who may have depression based on their reported symptoms. It is not a diagnostic tool on its own. A formal diagnosis requires a comprehensive clinical interview where a mental health professional evaluates your symptoms, duration, and impact on daily life, while also ruling out other medical conditions that might mimic depression.
high score indicates that you are experiencing symptoms consistent with depression, but it does not confirm a diagnosis. Your provider will likely follow up with a more detailed interview to assess the severity and duration of your symptoms. They may also order lab tests to rule out physical causes and discuss treatment options, which can include therapy, medication, or a combination of both.
Yes, several medical conditions can present with symptoms similar to depression, including fatigue, low mood, and cognitive difficulties. Thyroid disorders, anemia, vitamin deficiencies, and chronic pain are common examples. This is why providers often order blood tests during the evaluation process to ensure that underlying physical health issues are not the primary cause of your symptoms.
Current medical guidelines recommend that all adults be screened for depression at least once during their lifetime, with routine screening often integrated into regular primary care visits. However, more frequent screening is recommended for individuals with risk factors such as a history of mental health issues, chronic medical conditions, or significant life stressors.
Source: MedlinePlus, National Library of Medicine

MedlinePlus brings together authoritative health information from the National Library of Medicine (NLM), the National Institutes of Health (NIH), and other government agencies and health-related organizations.

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