The diagnosis of OCD is conducted by qualified mental health professionals, such as psychiatrists or clinical psychologists. The diagnostic process typically involves:

• Clinical interview – to evaluate the individual’s thoughts, behaviors, and emotional state.
• Collection of personal, medical, and family history – to identify contributing factors and rule out other conditions.
• Assessment of symptoms – focusing on the frequency, intensity, duration, and impact of obsessions and compulsions on daily functioning.
• Use of psychometric tools and standardized rating scales – such as the Yale-Brown Obsessive Compulsive Scale (Y-BOCS), to quantify symptom severity and guide treatment planning.