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 51006-5: Direct antiglobulin test.unspecified reagent Ql (RBC)

Name: LOINC Code 51006-5: Direct antiglobulin test.unspecified reagent Ql (RBC)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:35.011Z

51006-5 is a LOINC code used to identify Direct antiglobulin test.unspecified reagent Ql (RBC) 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 Direct antiglobulin test.XXX reagent. It is commonly used with the system or sample type RBC.

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 Direct antiglobulin test.XXX reagent. It is commonly used with the system or sample type RBC.

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

Direct antiglobulin test.unspecified reagent [Presence] on Red Blood Cells
Direct antiglobulin test.XXX reagent
Antiglob; BLOOD BANK; DAGT; DAT; DCT; Dir; Direct Coomb; Direct coombs test; Erythrocytes; Hematology; Heme; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Red blood cells; Red blood corpusles; Screen

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

Direct antiglobulin test.unspecified reagent Ql (RBC)Direct antiglobulin test.unspecified reagent [Presence] on Red Blood CellsDAT RBC QlDirect antiglobulin test.XXX reagentBLDBKDirect Antiglobulin Test (DAT; Direct Coombs), Red blood cellsPrThr

Frequently asked questions

Code details

Code51006-5

SystemLOINC

Display nameDirect antiglobulin test.unspecified reagent Ql (RBC)

DescriptionDirect antiglobulin test.XXX reagent

Short nameDAT RBC Ql

ComponentDirect antiglobulin test.XXX reagent

PropertyPrThr

TimingPt

System (specimen)RBC

ScaleOrd

ClassBLDBK

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.73

Consumer names

Direct Antiglobulin Test (DAT; Direct Coombs), Red blood cells

Part names

Direct antiglobulin test.XXX reagentPrThrPtRBCOrdPresence or ThresholdPoint in time (spot)Red Blood Cells

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.