LOINCActive

LOINC Code 11368-8: Illness or injury onset date and time

11368-8 is a LOINC code used to identify Illness or injury onset date and time 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 Illness or injury onset date and time. It is commonly used with the system or sample type ^Patient.

Reviewed by HealthAssure Clinical TeamUpdated 21 May 2026

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 Illness or injury onset date and time. 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

  • Illness or injury onset date and time
  • AOEObservation; Date and time; Date+time; H+P; H+P.HX; P prime; Point in time; QNT; Quan; Quant; Quantitative; Random; Time stamp; Timestamp; Ulcer

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

Illness or injury onset date and timeH&P.HXTmStpPt^PatientQnTime Stamp (Date and Time)

Frequently asked questions

Code details

Code11368-8
SystemLOINC
Display nameIllness or injury onset date and time
Short nameIllness or injury onset date and time
ComponentIllness or injury onset date and time
PropertyTmStp
TimingPt
System (specimen)^Patient
ScaleQn
ClassH&P.HX
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.73

Part names

Illness or injury onset date and timeTmStpPt^PatientQnTime Stamp (Date and Time)Point in time (spot)

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.

LOINC Code 11368-8 | HealthAssure