LOINCActiveObservation

LOINC Code 78234-2: Cells.MLL rearrangements/Cells counted FISH (Bld/Tiss)

78234-2 is a LOINC code used to identify Cells.MLL rearrangements/Cells counted FISH (Bld/Tiss) 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 Cells.MLL gene rearrangements/Cells counted. 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 Cells.MLL gene rearrangements/Cells counted. 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

  • Cells.MLL gene rearrangements/Cells counted in Blood or Tissue by FISH
  • Cells.MLL gene rearrangements/Cells counted
  • ALL1; ALL-1; Blood; Cell; Cells.MLL rearr; Cellularity; CXXC7; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; HRX; HTRX; HTRX1; Inherited; lysine (K)-specific methyltransferase 2A; MLL; MLL/GAS7; MLL1; MLL1A; Molecular pathology; MOLPATH; MOLPATH.REARRANGEMENTS; myeloid/lymphoid or mixed-lineage leukemia (trithorax (Drosophila) homolog); Number fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Rearr; Rearrangement; TET1-MLL; Tissue; Tissue, unspecified; TRX1; WB; WDSTS; 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

Cells.MLL rearrangements/Cells counted FISH (Bld/Tiss)Cells.MLL gene rearrangements/Cells counted in Blood or Tissue by FISHCells.MLL rear/Cells cnt NFr Bld/T FISHCells.MLL gene rearrangements/Cells countedMOLPATH.REARRANGECells.MLL Rearrangements/Cells Counted, Blood or tissue specimenNFr

Frequently asked questions

Code details

Code78234-2
SystemLOINC
Display nameCells.MLL rearrangements/Cells counted FISH (Bld/Tiss)
DescriptionCells.MLL gene rearrangements/Cells counted
Short nameCells.MLL rear/Cells cnt NFr Bld/T FISH
ComponentCells.MLL gene rearrangements/Cells counted
PropertyNFr
TimingPt
System (specimen)Bld/Tiss
ScaleQn
MethodFISH
ClassMOLPATH.REARRANGE
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.61

Consumer names

Cells.MLL Rearrangements/Cells Counted, Blood or tissue specimen

Part names

Cells.MLL gene rearrangements/Cells countedNFrPtBld/TissQnFISHNumber FractionPoint 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.

LOINC Code 78234-2 | HealthAssure