Bipolar Disorder: A mood disorder characterized by alternating episodes of mania and depression. Specialists: Psychiatrists, Psychologists, Cognitive-Behavioral Therapists, Geriatric Psychiatrists. Diagnosis: Based on DSM-5 criteria, patient history, mood tracking, and screening tools like the MDQ (Mood Disorder Questionnaire). Treatments: Mood stabilizers (e.g., lithium), antipsychotic medications, psychotherapy, and lifestyle adjustments.