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 831-8: A variant subtype RBC Aggl Ql (S/P donor)

Name: LOINC Code 831-8: A variant subtype RBC Aggl Ql (S/P donor)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:10.306Z

831-8 is a LOINC code used to identify A variant subtype RBC Aggl Ql (S/P donor) 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 subtype. It is commonly used with the system or sample type Ser/Plas^Donor.

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 subtype. It is commonly used with the system or sample type Ser/Plas^Donor.

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 Serum or Plasma from donor
A variant subtype
A variant subtype present in varying strengths and amounts resulting in variant behavior
A Var Subtyp; Agg; Agglut; Agglutination; Arbitrary Concentration; BLOOD BANK; Donr; Ordinal; Pl; Plasma; Plsm; Point in time; QL; Qual; Qualitative; Random; Screen; 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

A variant subtype RBC Aggl Ql (S/P donor)Deprecated A variant subtype Ab [Presence] in Serum or Plasma from donorDeprecated A Var Subtyp SerPl Donr QlA variant subtypeBLDBKA variant subtype, Donor BloodACnc

Frequently asked questions

Code details

Code831-8

SystemLOINC

Display nameA variant subtype RBC Aggl Ql (S/P donor)

DescriptionA variant subtype

Short nameDeprecated A Var Subtyp SerPl Donr Ql

ComponentA variant subtype

PropertyACnc

TimingPt

System (specimen)Ser/Plas^Donor

ScaleOrd

MethodAggl RBC

ClassBLDBK

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.36

Consumer names

A variant subtype, Donor Blood

Part names

A variant subtypeACncPtSer/Plas^DonorOrdAggl RBCArbitrary ConcentrationPoint in time (spot)Serum or Plasma^Donor

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.