---
title: How Do Mental Health Experts Diagnose Clinical Depression?
description: Clinical depression, also known as major depressive disorder. Here you can understand how mental health experts diagnose clinical depression.
image: https://friendlyhousela.org/hubfs/Imported_Blog_Media/cllinical-depression.jpg
---
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# How Do Mental Health Experts Diagnose Clinical Depression?
by [Friendly House](https://friendlyhousela.org/blog/author/friendly-house) on August 17, 2022
[clinical depression](https://friendlyhousela.org/blog/tag/clinical-depression) [Blog](https://friendlyhousela.org/blog/tag/blog)
Clinical depression, also known as major depressive disorder (MDD), is included in the [Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition](https://dsm.psychiatryonline.org/doi/book/10.1176/appi.books.9780890425596) (DSM-5) and is recognized as a serous mood disorder. According to [Johns Hopkins Medicine](https://www.hopkinsmedicine.org/health/conditions-and-diseases/mood-disorders), “a mood disorder is a mental health class that health professionals use to broadly describe all types of depression and bipolar disorders.” Clinical depression is [characterized](https://www.who.int/health-topics/depression#tab=tab_1) by persistently depressed mood and/ or a loss of interest in previously enjoyed activities, impairing one’s ability to function in his or her daily life.
## **Diagnosis Process**
Clinical depression is known as a differential diagnosis. A [differential diagnosis](https://www.verywellmind.com/provisional-diagnosis-vs-differential-diagnosis-1067284) implies that there are other possible diagnoses, and requires the diagnostician to differentiate between these possibilities to determine the actual diagnosis and appropriate treatment plan. To begin the diagnosis process, an individual must undergo a physical exam, including a complete medical history. Although there are currently no laboratory test or scans used to detect or diagnose major depressive disorder, some tests (e.g., blood tests) may be used in the diagnosis process to check for any other underlying conditions that may be causing symptoms.
If no signs of physical illness are determined, the process continues with an assessment conducted by a mental health professional that specializes in diagnosing and treating mental illnesses (e.g., psychiatrist, psychologist, etc.). The mental health professional will ask in-depth questions about one’s reported symptoms (e.g., how long they last, how intense they are, etc.), how the symptoms interfere with one’s daily life, will make observations of one’s attitude and behavior, and may use psychological questionnaires to help determine a diagnosis. Mental health experts also rely on the [diagnostic criteria](https://www.ncbi.nlm.nih.gov/books/NBK519712/table/ch3.t5/) provided in the DSM-5, which is outlined as follows:
1. An individual must be experiencing five or more of the following symptoms during the same 2-week period and at least one of the symptoms should be either (1) depressed mood or (2) loss of interest or pleasure:
1. Depressed mood most of the day, nearly every day.
2. Markedly diminished interest or pleasure in all, or almost all, activities most of the day, nearly every day.
3. Significant weight loss when not dieting or weight gain or decrease or increase in appetite nearly every day.
4. A slowing down of thought and a reduction of physical movement (observable by others, not merely subjective feelings of restlessness or being slowed down).
5. Fatigue or loss of energy nearly every day.
6. Feelings of worthlessness or excessive or inappropriate guilt nearly every day.
7. Diminished ability to think or concentrate, or indecisiveness, nearly every day.
8. Recurrent thoughts of death, recurrent suicidal ideation without a specific plan, or a suicide attempt or a specific plan for committing suicide.
These symptoms must cause the individual clinically significant distress or impairment in social, occupational, or other important areas of functioning. The symptoms must also not be a result of [substance abuse](https://friendlyhousela.org/substance-abuse-in-the-workplace/) or another medical condition.
## **For Information and Support**
Substance abuse and addiction can be incredibly dangerous and can result in severe short and long-term consequences. If you or someone you know is suffering from substance abuse or addiction, please get help as soon as possible. The earlier you seek support, the sooner you and your loved ones can return to leading happy, healthy, and fulfilling lives. There is no reason to go through this alone, and we are here to help. Please feel free to reach out to us for further information or with any questions regarding substance abuse or addiction. We are available anytime via telephone at: 213-389-9964, or you can always email us at: [info@friendlyhousela.org](mailto:info@friendlyhousela.org).
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