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 55775-1: Direct antiglobulin test.IgA specific reagent Ql (RBC)

Name: LOINC Code 55775-1: Direct antiglobulin test.IgA specific reagent Ql (RBC)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:37.766Z

55775-1 is a LOINC code used to identify Direct antiglobulin test.IgA specific 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.IgA specific 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.IgA specific 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.IgA specific reagent [Presence] on Red Blood Cells
Direct antiglobulin test.IgA specific reagent
Antiglob; BLOOD BANK; DAGT; DAT; DAT IgA-Sp Reag; DCT; Dir; Direct Coomb; Direct coombs test; Erythrocytes; Hematology; Heme; Immune globulin A; Immunoglobulin A; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Red blood cells; Red blood corpusles; Screen; Spec

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.IgA specific reagent Ql (RBC)Direct antiglobulin test.IgA specific reagent [Presence] on Red Blood CellsDAT IgA-Sp Reag RBC QlDirect antiglobulin test.IgA specific reagentBLDBKDirect Antiglobulin Test (DAT; Direct Coombs), Red blood cellsPrThr

Frequently asked questions

Code details

Code55775-1

SystemLOINC

Display nameDirect antiglobulin test.IgA specific reagent Ql (RBC)

DescriptionDirect antiglobulin test.IgA specific reagent

Short nameDAT IgA-Sp Reag RBC Ql

ComponentDirect antiglobulin test.IgA specific reagent

PropertyPrThr

TimingPt

System (specimen)RBC

ScaleOrd

ClassBLDBK

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.29

Last changed2.56

Consumer names

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

Part names

Direct antiglobulin test.IgA specific 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.