The diagnosis of Obsessive-Compulsive Disorder (OCD) is made by mental health professionals through a clinical evaluation. This evaluation process typically involves the following steps:nn1. Clinical Interview: A psychiatrist or clinical psychologist conducts an interview to thoroughly understand the patient's symptoms, when they began, how long they have persisted, and how they impact daily life. Information is gathered about the patient's thoughts, feelings, and behaviors during this interview.nn2. Symptom Assessment: The core symptoms of OCD, namely obsessions (recurrent, unwanted, and intrusive thoughts, urges, or images) and compulsions (repetitive behaviors or mental acts performed to reduce the anxiety caused by these obsessions), are examined in detail. For a diagnosis, these symptoms must be present for a specified duration and significantly impair the individual's quality of life.nn3. Differential Diagnosis: Other mental disorders that may present with symptoms similar to OCD (e.g., generalized anxiety disorder, social anxiety disorder, depression, tic disorders) and medical conditions must be ruled out. This is crucial for establishing the correct treatment plan.nn4. Diagnostic Criteria: Current diagnostic guidelines, such as the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), are used to apply the diagnostic criteria for OCD. These criteria require the presence of obsessions and compulsions, that they consume a significant amount of the individual's time, cause marked distress or impairment in functioning, and are not attributable to the direct physiological effects of a substance or another medical condition.nn5. Additional Assessments as Needed: In some cases, a physical examination or laboratory tests may be requested to assess the potential impact of any underlying medical condition.nnOCD can only be diagnosed by a licensed mental health professional (psychiatrist or clinical psychologist).