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.

LOINCActiveObservation

LOINC Code 103598-9: Direct antiglobulin test.polyspecific reagent Ql (RBC fetus)

Name: LOINC Code 103598-9: Direct antiglobulin test.polyspecific reagent Ql (RBC fetus)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:17.904Z

103598-9 is a LOINC code used to identify Direct antiglobulin test.polyspecific reagent Ql (RBC fetus) 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.polyspecific reagent. It is commonly used with the system or sample type RBC^Fetus.

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.polyspecific reagent. It is commonly used with the system or sample type RBC^Fetus.

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: Observation

What it does not mean

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

Key facts

Direct antiglobulin test.polyspecific reagent [Presence] on Red Blood Cells from Fetus

Direct antiglobulin test.polyspecific reagent

The direct antiglobulin test is used to detect the presence of antibodies or complement proteins bound to the surface of red blood cells. It is primarily utilized in the diagnosis of immune-mediated hemolytic anemias and transfusion reactions. [PMID22566278]

Antiglob; BLOOD BANK; DAGT; DAT; DAT Poly-Sp Reag; DCT; Dir; Direct antiglobulin test.non specific reagent; Direct Coomb; Direct coombs test; Erythrocytes; Fetal; Ordinal; Point in time; poly specific; 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.polyspecific reagent Ql (RBC fetus)Direct antiglobulin test.polyspecific reagent [Presence] on Red Blood Cells from FetusDAT Poly-Sp Reag RBC Fetus QlDirect antiglobulin test.polyspecific reagentBLDBKFetal Direct Antiglobulin Test (DAT; Direct Coombs)PrThr

Frequently asked questions

Code details

Code103598-9

SystemLOINC

Display nameDirect antiglobulin test.polyspecific reagent Ql (RBC fetus)

DescriptionDirect antiglobulin test.polyspecific reagent

Short nameDAT Poly-Sp Reag RBC Fetus Ql

ComponentDirect antiglobulin test.polyspecific reagent

PropertyPrThr

TimingPt

System (specimen)RBC^Fetus

ScaleOrd

ClassBLDBK

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.77

Last changed2.82

Consumer names

Fetal Direct Antiglobulin Test (DAT; Direct Coombs)

Part names

Direct antiglobulin test.polyspecific reagentPrThrPtRBC^FetusOrdPresence 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.