LOINCActiveObservation

LOINC Code 94652-5: Known exposure date

94652-5 is a LOINC code used to identify Known exposure date 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 Known exposure date. 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 Known exposure date. 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
  • Order vs observation: Observation

What it does not mean

  • The code identifies the observation or test, not the actual result.

Key facts

  • Known exposure date
  • The date the patient was known to be exposed. This term can be used to report the date for a variety of exposures, such as to a confirmed case, a toxic chemical, or live animals.
  • Exp; H+P; H+P.HX; P prime; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Known exposure dateExposure dateH&P.HXDatePt^PatientQn

Frequently asked questions

Code details

Code94652-5
SystemLOINC
Display nameKnown exposure date
Short nameExposure date
ComponentKnown exposure date
PropertyDate
TimingPt
System (specimen)^Patient
ScaleQn
ClassH&P.HX
Example unitsMMDDYY
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.68
Last changed2.68

Part names

Known exposure dateDatePt^PatientQnPoint 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 94652-5 | HealthAssure