This chapter focuses on psychiatric history collection and mental status examination. Psychiatric history collection include demographic data, chief complaints/presenting complaints (list with duration), present psychiatric history/nature of the current episode, past psychiatric history, past medical history, past surgical history, obstetrical history (female), family history, personal history, and premorbid personality. Mental status examination (MSE) format include general appearance and behavior, speech, mood and affect, thought, disorder of perception, and cognitive functions.