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 78228-4: IGH rearrangements FISH Nar (Bld/Tiss) [Interp]

Name: LOINC Code 78228-4: IGH rearrangements FISH Nar (Bld/Tiss) [Interp]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:58.755Z

78228-4 is a LOINC code used to identify IGH rearrangements FISH Nar (Bld/Tiss) [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 IGH gene rearrangements. It is commonly used with the system or sample type Bld/Tiss.

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 IGH gene rearrangements. It is commonly used with the system or sample type Bld/Tiss.

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: FISH

What it does not mean

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

Key facts

IGH gene rearrangements [Interpretation] in Blood or Tissue by FISH Narrative
IGH gene rearrangements
Blood; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; IGH.1@; IGH@; IGHD@; IGHDY1; IGHJ; IGHJ@; IGHV; IGHV@; immunoglobulin heavy locus; Impression; Impression/interpretation of study; Impressions; Inherited; Interp; Interpretation; Molecular pathology; MOLPATH; MOLPATH.REARRANGEMENTS; Narrative; Point in time; Random; Rearr; Rearrangement; Report; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue

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

IGH rearrangements FISH Nar (Bld/Tiss) [Interp]IGH gene rearrangements [Interpretation] in Blood or Tissue by FISH NarrativeIGH gene rearrange Bld/T FISH-ImpIGH gene rearrangementsMOLPATH.REARRANGEInterpretation of IGH rearrangements test result, Blood or tissue specimenImp

Frequently asked questions

Code details

Code78228-4

SystemLOINC

Display nameIGH rearrangements FISH Nar (Bld/Tiss) [Interp]

DescriptionIGH gene rearrangements

Short nameIGH gene rearrange Bld/T FISH-Imp

ComponentIGH gene rearrangements

PropertyImp

TimingPt

System (specimen)Bld/Tiss

ScaleNar

MethodFISH

ClassMOLPATH.REARRANGE

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.54

Last changed2.61

Consumer names

Interpretation of IGH rearrangements test result, Blood or tissue specimen

Part names

IGH gene rearrangementsImpPtBld/TissNarFISHImpression/interpretation of studyPoint in time (spot)Blood or TissueFluorescent in situ hybridization (FISH)

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.