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 42912-6: Hemoglobin spec 2 Ql (Specimen gastrointestinal)

Name: LOINC Code 42912-6: Hemoglobin spec 2 Ql (Specimen gastrointestinal)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:28.586Z

42912-6 is a LOINC code used to identify Hemoglobin spec 2 Ql (Specimen gastrointestinal) 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^2nd specimen. It is commonly used with the system or sample type XXX^Patient.gastrointestinal.

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^2nd specimen. It is commonly used with the system or sample type XXX^Patient.gastrointestinal.

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

Hemoglobin [Presence] in Specimen from gastrointestinal --2nd specimen
Hemoglobin^2nd specimen
Chemistry; Convalescent; Haemoglobin; Hb; Hemoglobin 2; Hgb; Misc; Miscellaneous; Ordinal; Other; Point in time; Post immunization; PR; QL; Qual; Qualitative; Random; Screen; Second; sp2; Spec; To be specified in another part of the message; Unspecified; xxx pat gastro

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 spec 2 Ql (Specimen gastrointestinal)Hemoglobin [Presence] in Specimen from gastrointestinal --2nd specimenHgb sp2 Spec gastro QlHemoglobin^2nd specimenCHEMHemoglobin specimen 2, gastrointestinal SpecimenPrThr

Frequently asked questions

Code details

Code42912-6

SystemLOINC

Display nameHemoglobin spec 2 Ql (Specimen gastrointestinal)

DescriptionHemoglobin^2nd specimen

Short nameHgb sp2 Spec gastro Ql

ComponentHemoglobin^2nd specimen

PropertyPrThr

TimingPt

System (specimen)XXX^Patient.gastrointestinal

ScaleOrd

ClassCHEM

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.16

Last changed2.82

Consumer names

Hemoglobin specimen 2, gastrointestinal Specimen

Part names

Hemoglobin^2nd specimenPrThrPtXXX^Patient.gastrointestinalOrdPresence or ThresholdPoint 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.