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.

LOINCActiveBoth

LOINC Code 38609-4: Methyl tert-butyl ether (Air) [Mass/Vol]

Name: LOINC Code 38609-4: Methyl tert-butyl ether (Air) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

38609-4 is a LOINC code used to identify Methyl tert-butyl ether (Air) [Mass/Vol] 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 Methyl tert-butyl ether. It is commonly used with the system or sample type Air.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Methyl tert-butyl ether. It is commonly used with the system or sample type Air.

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: Both

What it does not mean

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

Key facts

Methyl tert-butyl ether [Mass/volume] in Air
Methyl tert-butyl ether
2-methoxy-2-methylpropane; Butyl methyl ether; DRUG/TOXICOLOGY; Drugs; Level; Mass concentration; Methyl tertiary butyl ether; MTBE; Point in time; QNT; Quan; Quant; Quantitative; Random; TBME; t-butyl methyl ether; Tert-butyl methyl ether

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Methyl tert-butyl ether (Air) [Mass/Vol] (38609-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Methyl tert-butyl ether (Air) [Mass/Vol]Methyl tert-butyl ether [Mass/volume] in AirMTBE Air-mCncMethyl tert-butyl etherDRUG/TOXMethyl tert-butyl ether, AirMCnc

Frequently asked questions

Code details

Code38609-4

SystemLOINC

Display nameMethyl tert-butyl ether (Air) [Mass/Vol]

DescriptionMethyl tert-butyl ether

Short nameMTBE Air-mCnc

ComponentMethyl tert-butyl ether

PropertyMCnc

TimingPt

System (specimen)Air

ScaleQn

ClassDRUG/TOX

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.14

Last changed2.34

Consumer names

Methyl tert-butyl ether, Air

Part names

Methyl tert-butyl etherMCncPtAirQnMass ConcentrationPoint 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.