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 918-3: B variant subtype Ab Ql (S/P donor)

Name: LOINC Code 918-3: B variant subtype Ab Ql (S/P donor)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:21.442Z

918-3 is a LOINC code used to identify B variant subtype Ab 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 B variant subtype Ab. 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 B variant subtype Ab. 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: ACTIVE
Order vs observation: Observation

What it does not mean

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

Key facts

B variant subtype Ab [Presence] in Serum or Plasma from Donor
B variant subtype Ab
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; B Var Subtyp; BLOOD BANK; Donr; Ordinal; Pl; Plasma; Plsm; Point in time; PR; 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

B variant subtype Ab Ql (S/P donor)B variant subtype Ab [Presence] in Serum or Plasma from DonorB Var Subtyp Ab SerPl Donr QlB variant subtype AbBLDBKB variant subtype antibody, Donor BloodPrThr

Frequently asked questions

Code details

Code918-3

SystemLOINC

Display nameB variant subtype Ab Ql (S/P donor)

DescriptionB variant subtype Ab

Short nameB Var Subtyp Ab SerPl Donr Ql

ComponentB variant subtype Ab

PropertyPrThr

TimingPt

System (specimen)Ser/Plas^Donor

ScaleOrd

ClassBLDBK

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.56

Consumer names

B variant subtype antibody, Donor Blood

Part names

B variant subtype AbPrThrPtSer/Plas^DonorOrdPresence or ThresholdPoint 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.