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 99504-3: Glucose (Interstitial fluid) [Mass/Vol]

Name: LOINC Code 99504-3: Glucose (Interstitial fluid) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.065Z

99504-3 is a LOINC code used to identify Glucose (Interstitial fluid) [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 Glucose. It is commonly used with the system or sample type Interstitial fluid.

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 Glucose. It is commonly used with the system or sample type Interstitial fluid.

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

Glucose [Mass/volume] in Interstitial fluid

Glucose

The glucose value typically reported from a continuous glucose monitor (CGM) device. Multiple readings are taken over a period of time. To report the average of the readings, use Average glucose [Mass/volume] in Interstitial fluid during Reporting Period [LOINC97507-8].

Chemistry; Glu; Gluc; Glucoseur; Interstitial fld; Level; Mass concentration; Point in time; QNT; Quan; Quant; Quantitative; Random

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

Glucose (Interstitial fluid) [Mass/Vol]Glucose [Mass/volume] in Interstitial fluidGlucose Interstitial fld-mCncGlucoseCHEMGlucose, Interstitial fluidMCnc

Frequently asked questions

Code details

Code99504-3

SystemLOINC

Display nameGlucose (Interstitial fluid) [Mass/Vol]

DescriptionGlucose

Short nameGlucose Interstitial fld-mCnc

ComponentGlucose

PropertyMCnc

TimingPt

System (specimen)Interstitial fluid

ScaleQn

ClassCHEM

Example unitsmg/dL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Glucose, Interstitial fluid

Part names

GlucoseMCncPtInterstitial fluidQnMass 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.