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 40850-0: Glucose 2nd specimen post Unsp challenge Test strip (U) [Mass/Vol]

Name: LOINC Code 40850-0: Glucose 2nd specimen post Unsp challenge Test strip (U) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.146Z

40850-0 is a LOINC code used to identify Glucose 2nd specimen post Unsp challenge Test strip (U) [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^2nd specimen post XXX challenge. It is commonly used with the system or sample type Urine.

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^2nd specimen post XXX challenge. It is commonly used with the system or sample type Urine.

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: Test strip

What it does not mean

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

Key facts

Glucose [Mass/volume] in Urine by Test strip --2nd specimen post XXX challenge
Glucose^2nd specimen post XXX challenge
After; CHEMISTRY.CHALLENGE TESTING; Convalescent; Dip stick; Dipstick; Glu; Glu tol; Gluc; Glucose tolerance; Glucoseur; GTT; Level; Mass concentration; p chal; Point in time; Post immunization; PST; Random; Second; SmQn; sp2; sp2 p chal; Spec; UA; UR; Urn

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 2nd specimen post Unsp challenge Test strip (U) [Mass/Vol]Glucose [Mass/volume] in Urine by Test strip --2nd specimen post XXX challengeGlucose sp2 p chal Ur Strip-mCncGlucose^2nd specimen post XXX challengeCHALGlucose 2nd specimen after challenge, UrineMCnc

Frequently asked questions

Code details

Code40850-0

SystemLOINC

Display nameGlucose 2nd specimen post Unsp challenge Test strip (U) [Mass/Vol]

DescriptionGlucose^2nd specimen post XXX challenge

Short nameGlucose sp2 p chal Ur Strip-mCnc

ComponentGlucose^2nd specimen post XXX challenge

PropertyMCnc

TimingPt

System (specimen)Urine

ScaleSemiQn

MethodTest strip

ClassCHAL

Example unitsmg/dL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.75

Consumer names

Glucose 2nd specimen after challenge, Urine

Part names

Glucose^2nd specimen post XXX challengeMCncPtUrineSemiQnTest stripMass 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.