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.

LOINC

LOINC Code 64400-5: In the last 12 months, has your childs chest sounded wheezy during or after exercise [PhenX]

Name: LOINC Code 64400-5: In the last 12 months, has your childs chest sounded wheezy during or after exercise [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:43.950Z

64400-5 is a LOINC code used to identify In the last 12 months, has your childs chest sounded wheezy during or after exercise [PhenX] 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 In the last 12Mo, has your childs chest sounded wheezy during or after exercise. 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 In the last 12Mo, has your childs chest sounded wheezy during or after exercise. 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: TRIAL
Method: PhenX

What it does not mean

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

Key facts

In the last 12 months, has your childs chest sounded wheezy during or after exercise [PhenX]
In the last 12Mo, has your childs chest sounded wheezy during or after exercise
1 year; 12Mos; Child wheeze exercise 12Mo; EXCZ; Finding; Findings; Ordinal; Past; QL; Qual; Qualitative; Screen

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

In the last 12 months, has your childs chest sounded wheezy during or after exercise [PhenX]Child wheeze exercise 12Mo PhenXIn the last 12Mo, has your childs chest sounded wheezy during or after exercisePHENXFind12Mo^Patient

Frequently asked questions

Code details

Code64400-5

SystemLOINC

Display nameIn the last 12 months, has your childs chest sounded wheezy during or after exercise [PhenX]

DescriptionIn the last 12Mo, has your childs chest sounded wheezy during or after exercise

Short nameChild wheeze exercise 12Mo PhenX

ComponentIn the last 12Mo, has your childs chest sounded wheezy during or after exercise

PropertyFind

Timing12Mo

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

In the last 12Mo, has your childs chest sounded wheezy during or after exerciseFind12Mo^PatientOrdPhenXIn the last 12 months, has your childs chest sounded wheezy during or after exerciseFinding12 months

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.