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 65641-3: Activity that usually makes you feel breathless these days [PhenX]

Name: LOINC Code 65641-3: Activity that usually makes you feel breathless these days [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:45.457Z

65641-3 is a LOINC code used to identify Activity that usually makes you feel breathless these days [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 Activity that usually makes you feel breathless these days. 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 Activity that usually makes you feel breathless these days. 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

Activity that usually makes you feel breathless these days [PhenX]
Activity that usually makes you feel breathless these days
Activ; Activity makes breathless; Actvty; Finding; Findings; Movements; Nominal; 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

Activity that usually makes you feel breathless these days [PhenX]Activity makes breathless PhenXActivity that usually makes you feel breathless these daysPHENXFindPt^Patient

Frequently asked questions

Code details

Code65641-3

SystemLOINC

Display nameActivity that usually makes you feel breathless these days [PhenX]

DescriptionActivity that usually makes you feel breathless these days

Short nameActivity makes breathless PhenX

ComponentActivity that usually makes you feel breathless these days

PropertyFind

TimingPt

System (specimen)^Patient

ScaleNom

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

Activity that usually makes you feel breathless these daysFindPt^PatientNomPhenXFindingPoint 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.