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.

LOINCActiveObservation

LOINC Code 104638-2: Glucose standard deviation/ Glucose mean Calc (Reporting Period Interstitial fluid)

Name: LOINC Code 104638-2: Glucose standard deviation/ Glucose mean Calc (Reporting Period Interstitial fluid)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:19.128Z

104638-2 is a LOINC code used to identify Glucose standard deviation/ Glucose mean Calc (Reporting Period Interstitial fluid) 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 standard deviation/Glucose mean. 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 standard deviation/Glucose mean. 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: Observation
Method: Calculated

What it does not mean

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

Key facts

Glucose standard deviation/Glucose mean in Reporting Period Interstitial fluid by calculation
Glucose standard deviation/Glucose mean
Average; Avg; Calc; Calculation; Chemistry; Glu; Gluc; Glucose SD; Glucoseur; Gly var; Glycemic variability; Interstitial fld; Number Fraction; Percent; QNT; Quan; Quant; Quantitative; Report period

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 standard deviation/ Glucose mean Calc (Reporting Period Interstitial fluid)Glucose standard deviation/Glucose mean in Reporting Period Interstitial fluid by calculationGluc SD/Gluc mean RptPrd NFr In fld calcGlucose standard deviation/Glucose meanCHEMGlucose standard deviation, Interstitial fluidNFr

Frequently asked questions

Code details

Code104638-2

SystemLOINC

Display nameGlucose standard deviation/ Glucose mean Calc (Reporting Period Interstitial fluid)

DescriptionGlucose standard deviation/Glucose mean

Short nameGluc SD/Gluc mean RptPrd NFr In fld calc

ComponentGlucose standard deviation/Glucose mean

PropertyNFr

TimingRptPeriod

System (specimen)Interstitial fluid

ScaleQn

MethodCalculated

ClassCHEM

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.78

Last changed2.79

Consumer names

Glucose standard deviation, Interstitial fluid

Part names

Glucose standard deviation/Glucose meanNFrRptPeriodInterstitial fluidQnCalculatedGlucose standard deviation / Glucose meanNumber FractionReporting Period

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.