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LOINC Code 69977-7: Maximum expiratory gas flow/Predicted maximum expiratory gas flow Respiratory system airway --pre bronchodilation

69977-7 is a LOINC code used to identify Maximum expiratory gas flow/Predicted maximum expiratory gas flow Respiratory system airway --pre bronchodilation 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 Expiratory gas flow.max/Expiratory gas flow.max.predicted^pre bronchodilation. It is commonly used with the system or sample type Respiratory system.airway.

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 Expiratory gas flow.max/Expiratory gas flow.max.predicted^pre bronchodilation. It is commonly used with the system or sample type Respiratory system.airway.

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

  • Maximum expiratory gas flow/Predicted maximum expiratory gas flow Respiratory system airway --pre bronchodilation
  • Expiratory gas flow.max/Expiratory gas flow.max.predicted^pre bronchodilation
  • Before; Breathing; Dynamic; Gases; Largest; Lung; Lungs; Maximal; Maximum; Peak; Peak expiratory flow; PEF; Point in time; pre BD; Pulmonary; Pulmonology; QNT; Quan; Quant; Quantitative; Random; Relative volume rate; Respiratory; RS

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

Maximum expiratory gas flow/Predicted maximum expiratory gas flow Respiratory system airway --pre bronchodilationPEF/Predicted pre BD AirwayExpiratory gas flow.max/Expiratory gas flow.max.predicted^pre bronchodilationPULMRelVRatPtRespiratory system.airway

Frequently asked questions

Code details

Code69977-7
SystemLOINC
Display nameMaximum expiratory gas flow/Predicted maximum expiratory gas flow Respiratory system airway --pre bronchodilation
DescriptionExpiratory gas flow.max/Expiratory gas flow.max.predicted^pre bronchodilation
Short namePEF/Predicted pre BD Airway
ComponentExpiratory gas flow.max/Expiratory gas flow.max.predicted^pre bronchodilation
PropertyRelVRat
TimingPt
System (specimen)Respiratory system.airway
ScaleQn
ClassPULM
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.40
Last changed2.73

Part names

Expiratory gas flow.max/Expiratory gas flow.max.predicted^pre bronchodilationRelVRatPtRespiratory system.airwayQnRelative Volume RatePoint in time (spot)Respiratory system airway

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.