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 6689-4: Glucose 2 Hr post meal (Bld) [Mass/Vol]

Name: LOINC Code 6689-4: Glucose 2 Hr post meal (Bld) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

6689-4 is a LOINC code used to identify Glucose 2 Hr post meal (Bld) [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^2H post meal. It is commonly used with the system or sample type Bld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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^2H post meal. It is commonly used with the system or sample type Bld.

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 Blood --2 hours post meal
Glucose^2H post meal
120 min; 120 minutes; 120min; 2 hours; 2h p meal; After; Blood; CHEMISTRY.CHALLENGE TESTING; Endocrine; Endocrinology; Glu; Glu tol; Gluc; Glucose tolerance; Glucoseur; GTT; Level; Mass concentration; p meal; PC; Point in time; Post Pran; Post prandial; PP; PST; QNT; Quan; Quant; Quantitative; Random; WB; Whole blood

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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Glucose 2 Hr post meal (Bld) [Mass/Vol] (6689-4)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Glucose 2 Hr post meal (Bld) [Mass/Vol]Glucose [Mass/volume] in Blood --2 hours post mealGlucose 2h p meal Bld-mCncGlucose^2H post mealCHALGlucose 2 hr after Meal, BloodMCnc

Frequently asked questions

Code details

Code6689-4

SystemLOINC

Display nameGlucose 2 Hr post meal (Bld) [Mass/Vol]

DescriptionGlucose^2H post meal

Short nameGlucose 2h p meal Bld-mCnc

ComponentGlucose^2H post meal

PropertyMCnc

TimingPt

System (specimen)Bld

ScaleQn

ClassCHAL

Example unitsmg/dL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0g

Last changed2.73

Consumer names

Glucose 2 hr after Meal, Blood

Part names

Glucose^2H post mealMCncPtBldQnMass ConcentrationPoint in time (spot)Blood

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.