What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActive

LOINC Code 42563-7: Event description adverse event MERSTH

Name: LOINC Code 42563-7: Event description adverse event MERSTH
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:28.128Z

42563-7 is a LOINC code used to identify Event description adverse event MERSTH 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 Event description.adverse event. 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 Event description.adverse event. 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
Method: Observed.MERSTH

What it does not mean

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

Key facts

Event description adverse event MERSTH
Event description.adverse event
AE; Event Desc AE; Finding; Findings; Medical Event Reporting System-Total Health System; Nominal; Patient safety; Point in time; 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

Event description adverse event MERSTHEvent Desc AE MERSTHEvent description.adverse eventPATIENT SAFETYFindPt^Patient

Frequently asked questions

Code details

Code42563-7

SystemLOINC

Display nameEvent description adverse event MERSTH

DescriptionEvent description.adverse event

Short nameEvent Desc AE MERSTH

ComponentEvent description.adverse event

PropertyFind

TimingPt

System (specimen)^Patient

ScaleNom

MethodObserved.MERSTH

ClassPATIENT SAFETY

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.27

Part names

Event description.adverse eventFindPt^PatientNomObserved.MERSTHEvent description adverse eventFindingPoint 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.