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 54939-4: Meta methylhippurate+Para methylhippurate [Mass/Vol]

Name: LOINC Code 54939-4: Meta methylhippurate+Para methylhippurate [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:37.143Z

54939-4 is a LOINC code used to identify Meta methylhippurate+Para methylhippurate [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 Meta methylhippurate+Para methylhippurate. It is commonly used with the system or sample type Ser/Plas.

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 Meta methylhippurate+Para methylhippurate. It is commonly used with the system or sample type Ser/Plas.

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

Meta methylhippurate+Para methylhippurate [Mass/volume] in Serum or Plasma
Meta methylhippurate+Para methylhippurate
3-methlhippurate; 4-methylhippurate; DRUG/TOXICOLOGY; Drugs; Level; m+p-Methylhippurate; Mass Concentration; Methylhippuric acid; m-methlhippurate; m-Methylhippurate; Para methylhippuric acid; Pl; Plasma; Plsm; p-methylhippurate; Point in time; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Xylene metabolite

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

Meta methylhippurate+Para methylhippurate [Mass/Vol]Meta methylhippurate+Para methylhippurate [Mass/volume] in Serum or Plasmam+p-Methylhippurate SerPl-mCncMeta methylhippurate+Para methylhippurateDRUG/TOXMeta methylhippurate+Para methylhippurate, BloodMCnc

Frequently asked questions

Code details

Code54939-4

SystemLOINC

Display nameMeta methylhippurate+Para methylhippurate [Mass/Vol]

DescriptionMeta methylhippurate+Para methylhippurate

Short namem+p-Methylhippurate SerPl-mCnc

ComponentMeta methylhippurate+Para methylhippurate

PropertyMCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassDRUG/TOX

Example unitsug/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.27

Last changed2.73

Consumer names

Meta methylhippurate+Para methylhippurate, Blood

Part names

Meta methylhippurate+Para methylhippurateMCncPtSer/PlasQnMass ConcentrationPoint in time (spot)Serum or Plasma

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.