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 29771-3: Hemoglobin IA Ql (Stl gastrointestinal lower)

Name: LOINC Code 29771-3: Hemoglobin IA Ql (Stl gastrointestinal lower)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:15.475Z

29771-3 is a LOINC code used to identify Hemoglobin IA Ql (Stl gastrointestinal lower) 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 Hemoglobin. It is commonly used with the system or sample type Stool^Patient.gastrointestinal.lower.

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 Hemoglobin. It is commonly used with the system or sample type Stool^Patient.gastrointestinal.lower.

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
Method: IA

What it does not mean

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

Key facts

Hemoglobin [Presence] in Stool from gastrointestinal lower by Immunoassay
Hemoglobin
Bowel movement; Chemistry; EIA; ELFA; ELISA; Enzyme immunoassay; Faecal; Faeces; Fecal; Feces; gastro lower; Haemoglobin; Hb; Hemoccult gastro lower; Hgb; IAA; Low; MEIA; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Stl; Stool = Fecal; SUDS; UniversalLabOrders

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

Hemoglobin IA Ql (Stl gastrointestinal lower)Hemoglobin [Presence] in Stool from gastrointestinal lower by ImmunoassayHgb Stl gastro lower Ql IAHemoglobinCHEMHemoglobin, gastrointestinal lower StoolPrThr

Frequently asked questions

Code details

Code29771-3

SystemLOINC

Display nameHemoglobin IA Ql (Stl gastrointestinal lower)

DescriptionHemoglobin

Short nameHgb Stl gastro lower Ql IA

ComponentHemoglobin

PropertyPrThr

TimingPt

System (specimen)Stool^Patient.gastrointestinal.lower

ScaleOrd

MethodIA

ClassCHEM

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.04

Last changed2.82

Consumer names

Hemoglobin, gastrointestinal lower Stool

Part names

HemoglobinPrThrPtStool^Patient.gastrointestinal.lowerOrdIAPresence or ThresholdPoint in time (spot)Immunoassay

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.