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.

LOINC

LOINC Code 833-4: A variant NOS Ag RBC Aggl Ql (RBC BPU)

Name: LOINC Code 833-4: A variant NOS Ag RBC Aggl Ql (RBC BPU)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:10.307Z

833-4 is a LOINC code used to identify A variant NOS Ag RBC Aggl Ql (RBC BPU) 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 A variant NOS Ag. It is commonly used with the system or sample type RBC^BPU.

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 A variant NOS Ag. It is commonly used with the system or sample type RBC^BPU.

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: DEPRECATED
Method: Aggl RBC

What it does not mean

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

Key facts

Deprecated A variant subtype Ab [Presence] in RBC from Blood product unit
A variant NOS Ag
A variant subtype present in varying strengths and amounts resulting in variant behavior
Agg; Agglut; Agglutination; Antigen; Antigens; Arbitrary concentration; BLOOD BANK; Blood product unit; Blood Product Unit (Pack); Erythrocytes; Ordinal; Other; Point in time; 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

A variant NOS Ag RBC Aggl Ql (RBC BPU)Deprecated A variant subtype Ab [Presence] in RBC from Blood product unitDeprecated A variant NOS Ag RBC BPU QlA variant NOS AgBLDBKA Variant NOS antigen, Blood Product UnitACnc

Frequently asked questions

Code details

Code833-4

SystemLOINC

Display nameA variant NOS Ag RBC Aggl Ql (RBC BPU)

DescriptionA variant NOS Ag

Short nameDeprecated A variant NOS Ag RBC BPU Ql

ComponentA variant NOS Ag

PropertyACnc

TimingPt

System (specimen)RBC^BPU

ScaleOrd

MethodAggl RBC

ClassBLDBK

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.40

Consumer names

A Variant NOS antigen, Blood Product Unit

Part names

A variant NOS AgACncPtRBC^BPUOrdAggl RBCAgArbitrary ConcentrationPoint 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.