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 40296-6: Xylose post fast [Moles/Vol]

Name: LOINC Code 40296-6: Xylose post fast [Moles/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.145Z

40296-6 is a LOINC code used to identify Xylose post fast [Moles/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 Xylose^post CFst. 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 Xylose^post CFst. 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: Observation

What it does not mean

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

Key facts

Xylose [Moles/volume] in Serum or Plasma --fasting
Xylose^post CFst
After; Calorie Fast; CHEMISTRY.CHALLENGE TESTING; D-xylose; Fast; Fasting; Level; p fast; PC; Pl; Plasma; Plsm; Point in time; PST; QNT; Quan; Quant; Quantitative; Random; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Substance concentration; Xylose absorption test

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

Xylose post fast [Moles/Vol]Xylose [Moles/volume] in Serum or Plasma --fastingXylose p fast SerPl-sCncXylose^post CFstCHALXylose after Fast, BloodSCnc

Frequently asked questions

Code details

Code40296-6

SystemLOINC

Display nameXylose post fast [Moles/Vol]

DescriptionXylose^post CFst

Short nameXylose p fast SerPl-sCnc

ComponentXylose^post CFst

PropertySCnc

TimingPt

System (specimen)Ser/Plas

ScaleQn

ClassCHAL

Example unitsmmol/L;nmol/L

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.70

Consumer names

Xylose after Fast, Blood

Part names

Xylose^post CFstSCncPtSer/PlasQnSubstance 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.