LOINC Code 10164-2: History of Present illness Narrative
10164-2 is a LOINC code used to identify History of Present illness Narrative in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Present illness. It is commonly used with the system or sample type ^Patient.
What is this code?
LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component Present illness. It is commonly used with the system or sample type ^Patient.
When is it used?
- Used in lab systems, EHRs, and clinical data exchange.
- May identify a test, observation, survey item, or clinical document request rather than a diagnosis.
- Status: ACTIVE
What it does not mean
- The code identifies the observation or test, not the actual result.
Key facts
- History of Present illness Narrative
- Present illness
- History of present illness describes the history related to the reason for a given procedure. It contains the historical details leading up to and pertaining to the patient's current complaint or reason for seeking medical care. Because history of present illness can include past surgical history and other procedures, the Procedure History section may be included under the History of Present Illness section or it may stand alone as its own section.
- H+P; H+P.HX; History; Narrative; P prime; Point in time; Pres illness; Random; Report
Where you may see this code
You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges.
Common synonyms
Frequently asked questions
About this content
This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.