LOINCActive

LOINC Code 65653-8: Test challenge type Respiratory system

65653-8 is a LOINC code used to identify Test challenge type Respiratory system 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 Test challenge type. It is commonly used with the system or sample type Respiratory system.

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 Test challenge type. It is commonly used with the system or sample type Respiratory system.

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

  • Test challenge type Respiratory system
  • Test challenge type
  • Breathing; Lungs; Nominal; PhenX; Point in time; Random; RS; Typ

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

Test challenge type Respiratory systemTest challenge type RespiratoryTest challenge typePHENXTypePtRespiratory system

Frequently asked questions

Code details

Code65653-8
SystemLOINC
Display nameTest challenge type Respiratory system
DescriptionTest challenge type
Short nameTest challenge type Respiratory
ComponentTest challenge type
PropertyType
TimingPt
System (specimen)Respiratory system
ScaleNom
ClassPHENX
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.65

Part names

Test challenge typeTypePtRespiratory systemNomPoint 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 65653-8 | HealthAssure