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 903-5: Blood group antibody screen RESt adsorption Ql

Name: LOINC Code 903-5: Blood group antibody screen RESt adsorption Ql
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:19.829Z

903-5 is a LOINC code used to identify Blood group antibody screen RESt adsorption 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 Blood group antibody. 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 Blood group antibody. 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: Observation
Method: Blood group antibody screen.RESt adsorption

What it does not mean

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

Key facts

Blood group antibody screen [Presence] in Serum or Plasma by RESt adsorption
Blood group antibody
Rabbit Erythrocyte Stroma (RESt) is used to absorb cold antibodies (predominantly IgM) from a patients serum. The absorbed serum can then be used for other testing.
Ab; Bld gp Ab Scn; BLOOD BANK; Ordinal; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Rabbit Erythrocyte Stroma; Random; Scn; Scr; Screen; Scrn; 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

Blood group antibody screen RESt adsorption QlBlood group antibody screen [Presence] in Serum or Plasma by RESt adsorptionBld gp Ab Scn SerPl Ql RESt AdsBlood group antibodyBLDBKBlood group antibody screen, BloodPrThr

Frequently asked questions

Code details

Code903-5

SystemLOINC

Display nameBlood group antibody screen RESt adsorption Ql

DescriptionBlood group antibody

Short nameBld gp Ab Scn SerPl Ql RESt Ads

ComponentBlood group antibody

PropertyPrThr

TimingPt

System (specimen)Ser/Plas

ScaleOrd

MethodBlood group antibody screen.RESt adsorption

ClassBLDBK

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.82

Consumer names

Blood group antibody screen, Blood

Part names

Blood group antibodyPrThrPtSer/PlasOrdBlood group antibody screen.RESt adsorptionBlood group antibody screenPresence or ThresholdPoint in time (spot)Serum or PlasmaRESt adsorption

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.