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LOINC Code 84912-5: Cells.chromosome region 5q31 del/Cells counted FISH (BM)

84912-5 is a LOINC code used to identify Cells.chromosome region 5q31 del/Cells counted FISH (BM) 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.chromosome region 5q31 deletion/Cells counted. It is commonly used with the system or sample type Bone mar.

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.chromosome region 5q31 deletion/Cells counted. It is commonly used with the system or sample type Bone mar.

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: Both
  • Method: FISH

What it does not mean

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

Key facts

Cells.chromosome region 5q31 deletion/Cells counted in Bone marrow by FISH
Cells.chromosome region 5q31 deletion/Cells counted
The percent of cells in bone marrow containing the 5q31 deletion involving the EGR1 gene can be detected by FISH and used for the diagnosis of chronic lymphocytic leukemia (CLL), multiple myeloma as well as other forms of cancer. This term is used to report the number of cells that have the deletion out of total number of cells examined (e.g. 80 out of 100 cells, or 80%). Results are also typically reported in ISCN (International System for Human Cytogenetic Nomenclature) format [LOINC62356-1]. This term is based, but not limited in use to, the Vysis LSI EGR1 (5q31) probe, which targets the EGR1 gene and flanking regions.
BM; BON; Bone marrow; Cell; Cells.5q31; Cells.5q31 del; Cellularity; Chromosom; Chromosomes; Cyto loc; Del; Deletions; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; Inherited; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Molecular pathology; MOLPATH; MOLPATH.DELDUP; Number Fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random

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.chromosome region 5q31 del/Cells counted FISH (BM)Cells.chromosome region 5q31 deletion/Cells counted in Bone marrow by FISHCells.5q31 Del/Cells NFr Mar FISHCells.chromosome region 5q31 deletion/Cells countedMOLPATH.DELDUPCells.chromosome region 5q31/Cells Counted, Bone marrowNFr

Frequently asked questions

Code details

Code84912-5
SystemLOINC
Display nameCells.chromosome region 5q31 del/Cells counted FISH (BM)
DescriptionCells.chromosome region 5q31 deletion/Cells counted
Short nameCells.5q31 Del/Cells NFr Mar FISH
ComponentCells.chromosome region 5q31 deletion/Cells counted
PropertyNFr
TimingPt
System (specimen)Bone mar
ScaleQn
MethodFISH
ClassMOLPATH.DELDUP
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.58
Last changed2.63

Consumer names

Cells.chromosome region 5q31/Cells Counted, Bone marrow

Part names

Cells.chromosome region 5q31 deletion/Cells countedNFrPtBone marQnFISHNumber FractionPoint in time (spot)Bone marrowFluorescent 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.