History of the present illness
Following the chief complaint in medical history taking, a history of the present illness refers to a detailed interview prompted by the chief complaint or presenting symptom.
Questions to include
Different sources include different questions to be asked while conducting an HPI.Several acronyms have been developed to categorize the appropriate questions to include.
The Centers for Medicare and Medicaid Services has published criteria for what constitutes a reimbursable HPI. A "brief HPI" constitutes one to three of these elements. An "extended HPI" includes four or more of these elements.
| CMS | "OLDCARTS" | "OPQRST" or "PQRST" | "LOCATES" | "CLEARAST" | "LIQOR AAA" | "SCHOLAR" | "COLDER AS" |
| location | "L": Location | "R": Region and Radiation | "L" : Location | "L": Location | "L": Location | "L:" Location | "L:" Location |
| quality | "C": Character | "Q": Quality of the pain | "C": Character | "C": Character | "Q": Quality | "C:" Characteristics | "C": Character |
| "R": Radiation | "R": Radiation | see above | "R": Radiation | ||||
| severity | "S": Severity-how disruptive | "S": Severity | "S": Severity | "S": Severity | "I": Intensity | see above | "S": Severity |
| duration | "O": Onset "D": Duration | "O": Onset | "T": Time | "T": Time frame | "O": Onset | "O:" Onset "H:" History | "D:" Duration |
| timing | "T:" Timing | "T": Time | see above | see above | see above | see above | "O": Onset |
| context | "A": Aggravating factors | "E": Environment | - | ||||
| modifying factors | "R": Relieving factors | "P": Provocation or Palliation | "A" Alleviating/Aggravating Factors | "E": Exacerbation | "A": Aggravating factors | "A:" Aggravating factors | "E:" Exacerbation |
| "A": Alleviation | "A": Alleviating factors | "R:" Remitting factors | "R:" Remitting factors | ||||
| associated signs & symptoms | "O": Other symptoms | "A": associated symptoms | "A": Associated symptoms | see above | "A": Associated symptoms |
Also usable is SOCRATES. For chronic pain, the Stanford Five may be assessed to understand the pain experience from the patient's primary belief system.