LOINCActiveObservation

LOINC Code 1253-4: Major crossmatch Prewarmed [Interp]

1253-4 is a LOINC code used to identify Major crossmatch Prewarmed [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. 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. 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: Prewarmed

What it does not mean

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

Key facts

  • Major crossmatch [Interpretation] by Prewarmed
  • Major crossmatch
  • BLOOD BANK; Compatability testing; Impression; Impression/interpretation of study; Impressions; Interp; Interpretation; Maj XM; Nominal; Pl; Plasma; Plsm; Point in time; Pwarm; Random; 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

Major crossmatch Prewarmed [Interp]Major crossmatch [Interpretation] by PrewarmedMaj XM SerPl Pwarm-ImpMajor crossmatchBLDBKMajor crossmatch, BloodImp

Frequently asked questions

Code details

Code1253-4
SystemLOINC
Display nameMajor crossmatch Prewarmed [Interp]
DescriptionMajor crossmatch
Short nameMaj XM SerPl Pwarm-Imp
ComponentMajor crossmatch
PropertyImp
TimingPt
System (specimen)Ser/Plas
ScaleNom
MethodPrewarmed
ClassBLDBK
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.10

Consumer names

Major crossmatch, Blood

Part names

Major crossmatchImpPtSer/PlasNomPrewarmedImpression/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.

LOINC Code 1253-4 | HealthAssure