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 50012-4: Indirect antiglobulin test.polyspecific reagent PEG method Ql

Name: LOINC Code 50012-4: Indirect antiglobulin test.polyspecific reagent PEG method Ql
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:34.494Z

50012-4 is a LOINC code used to identify Indirect antiglobulin test.polyspecific reagent PEG method Ql 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 Indirect antiglobulin test.polyspecific reagent. 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 Indirect antiglobulin test.polyspecific reagent. 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: Both
Method: PEG

What it does not mean

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

Key facts

Indirect antiglobulin test.polyspecific reagent [Presence] in Serum or Plasma by Polyethylene glycol (PEG) method
Indirect antiglobulin test.polyspecific reagent
Antiglob; BLOOD BANK; Hematology; Heme; IAGT; IAT; IAT Poly-Sp Reag; IDC; Ind; Ind Coombs; Indir; Indirect Coomb; Indirect Coombs; Ordinal; Pl; Plasma; Plsm; Point in time; poly specific; Polyethylene Glycol; PR; QL; Qual; Qualitative; Random; Screen; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR

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

Indirect antiglobulin test.polyspecific reagent PEG method QlIndirect antiglobulin test.polyspecific reagent [Presence] in Serum or Plasma by Polyethylene glycol (PEG) methodIAT Poly-Sp Reag SerPl Ql PEGIndirect antiglobulin test.polyspecific reagentBLDBKIndirect Antiglobulin Test (IAT; Indirect Coombs), BloodPrThr

Frequently asked questions

Code details

Code50012-4

SystemLOINC

Display nameIndirect antiglobulin test.polyspecific reagent PEG method Ql

DescriptionIndirect antiglobulin test.polyspecific reagent

Short nameIAT Poly-Sp Reag SerPl Ql PEG

ComponentIndirect antiglobulin test.polyspecific reagent

PropertyPrThr

TimingPt

System (specimen)Ser/Plas

ScaleOrd

MethodPEG

ClassBLDBK

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.73

Consumer names

Indirect Antiglobulin Test (IAT; Indirect Coombs), Blood

Part names

Indirect antiglobulin test.polyspecific reagentPrThrPtSer/PlasOrdPEGPresence or ThresholdPoint in time (spot)Serum or PlasmaPolyethylene glycol (PEG) method

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.