How many types of History of Present Illness (HPI) exist according to the text?

The History of Present Illness (HPI) typically comprises two distinct types: the 'Chronological' format and the 'Bullet' format. The Chronological format presents a detailed narrative of the patient's symptoms in a timeline, often including the onset, duration, and progression of the illness. In contrast, the Bullet format condenses the information into concise, individual points that highlight pertinent details without excessive elaboration. Understanding these two types is crucial for accurately documenting patient encounters and ensuring proper coding and billing in Evaluation and Management services. This foundational knowledge is essential for any coder, as it directly impacts the level of service documented and ultimately billed.