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 46275-4: Major crossmatch post transfusion reaction [Interp]

Name: LOINC Code 46275-4: Major crossmatch post transfusion reaction [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:31.116Z

46275-4 is a LOINC code used to identify Major crossmatch post transfusion reaction [Interp] 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 Major crossmatch^post transfusion reaction. 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 Major crossmatch^post transfusion reaction. 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

What it does not mean

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

Key facts

Major crossmatch [Interpretation] --after transfusion reaction
Major crossmatch^post transfusion reaction
After; BLOOD BANK; Compatability testing; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Maj XM; Nominal; p transf; p transf rx; Pl; Plasma; Plsm; Point in time; PST; Random; React; Rxn; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; Transf React; Tx

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

Major crossmatch post transfusion reaction [Interp]Major crossmatch [Interpretation] --after transfusion reactionMaj XM p transf rx SerPl-ImpMajor crossmatch^post transfusion reactionBLDBKMajor crossmatch after Transfusion Reaction, BloodImp

Frequently asked questions

Code details

Code46275-4

SystemLOINC

Display nameMajor crossmatch post transfusion reaction [Interp]

DescriptionMajor crossmatch^post transfusion reaction

Short nameMaj XM p transf rx SerPl-Imp

ComponentMajor crossmatch^post transfusion reaction

PropertyImp

TimingPt

System (specimen)Ser/Plas

ScaleNom

ClassBLDBK

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.19

Last changed2.27

Consumer names

Major crossmatch after Transfusion Reaction, Blood

Part names

Major crossmatch^post transfusion reactionImpPtSer/PlasNomImpression/interpretation of studyPoint in time (spot)Serum or Plasma

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.