LOINCActiveObservation

LOINC Code 90565-3: Respiratory effort-related arousal index

90565-3 is a LOINC code used to identify Respiratory effort-related arousal index 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 Respiratory effort-related arousal index. 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 Respiratory effort-related arousal index. 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

  • Respiratory effort-related arousal index
  • Count/time; Lung; nRate; Number rate; Number Rate = Count/Time; PULMONARY; Pulmonology; QNT; Quan; Quant; Quantitative; RERA; Resp effort; Resp effort-related arousal; Resp effort-related arousal index; Respiratory; Studies; Study; Sutdies

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

Respiratory effort-related arousal indexResp effort-related arousal index nRatePULMNRatStdy^PatientQn

Frequently asked questions

Code details

Code90565-3
SystemLOINC
Display nameRespiratory effort-related arousal index
Short nameResp effort-related arousal index nRate
ComponentRespiratory effort-related arousal index
PropertyNRat
TimingStdy
System (specimen)^Patient
ScaleQn
ClassPULM
Example units/Hour
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Respiratory effort-related arousal indexNRatStdy^PatientQnNumber RateStudy

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 90565-3 | HealthAssure