A physician asks a patient, "how long has your issue been going on". The patient's answer is referred to as which of the following? Chief complaint Past medical history History of present iliness Review of systems

## Step 1<br />The question is asking for the term that refers to the patient's response to the physician's question, "how long has your issue been going on". This question is a part of the patient's medical history, specifically the "History of Present Illness" (HPI). <br /><br />## Step 2<br />The HPI is a detailed, chronological description of the problems prompting the patient's visit. It includes the onset, location, duration, character, radiating or referred pain, timing, context of the symptoms, and other associated symptoms. <br /><br />## Step 3<br />The other options provided, "Chief complaint", "Past medical history", and "Review of systems", are also parts of the patient's medical history, but they do not specifically refer to the patient's response to the physician's question about the duration of the issue. <br /><br />## Step 4<br />The "Chief complaint" is the primary symptom that prompts the patient to seek medical attention. The "Past medical history" refers to the patient's previous health issues, and the "Review of systems" is a systematic approach to identifying symptoms in different body systems. <br /><br />## Step 5<br />Therefore, the correct answer is "History of Present Illness".