LOINC

LOINC Code 65820-3: Time to expiratory gas flow.max

65820-3 is a LOINC code used to identify Time to expiratory gas flow.max 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 Time to expiratory gas flow.max. 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 Time to expiratory gas flow.max. 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

What it does not mean

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

Key facts

  • Time to expiratory gas flow.max
  • Dynamic; Gases; Largest; Lung; Maximal; Maximum; Peak; Peak expiratory flow; PEF; Point in time; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Respiratory; Time to PEF

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

Time to expiratory gas flow.maxTime to PEFPULMTimePt^PatientQn

Frequently asked questions

Code details

Code65820-3
SystemLOINC
Display nameTime to expiratory gas flow.max
Short nameTime to PEF
ComponentTime to expiratory gas flow.max
PropertyTime
TimingPt
System (specimen)^Patient
ScaleQn
ClassPULM
StatusTRIAL

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Time to expiratory gas flow.maxTimePt^PatientQnTime (e.g. seconds)Point 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 65820-3 | HealthAssure