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.

LOINCActiveBoth

LOINC Code 84913-3: Cells.chromosome 12 trisomy/Cells counted FISH (Bld/Tiss)

Name: LOINC Code 84913-3: Cells.chromosome 12 trisomy/Cells counted FISH (Bld/Tiss)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:11.791Z

84913-3 is a LOINC code used to identify Cells.chromosome 12 trisomy/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.chromosome 12 trisomy/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.chromosome 12 trisomy/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: Both
Method: FISH

What it does not mean

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

Key facts

Cells.chromosome 12 trisomy/Cells counted in Blood or Tissue by FISH

Cells.chromosome 12 trisomy/Cells counted

The percent of cells containing chromosome 12 trisomy can be detected by FISH and used for the diagnosis of chronic lymphocytic leukemia (CLL), multiple myeloma, non-Hodgkin's lymphoma (NHL) as well as other forms of cancer. This term is used to report the number of cells that have the extra chromosome out of total number of cells examined (e.g. 80 out of 100 cells, or 80%). Results are also reported in ISCN (International System for Human Cytogenetic Nomenclature) format [LOINC62356-1]. This term is based on, but not limited in use to, the Vysis LSI CEP12 probe, which targets the D12Z3 alpha satellite region.

Blood; Cell; Cells.Chr 12 Ts; Cellularity; Chr 12 Ts; Chromosom; Chromosomes; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; Inherited; Molecular pathology; MOLPATH; MOLPATH.TRISOMY; Number Fraction; Percent; Point in time; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified; Ts; 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

Cells.chromosome 12 trisomy/Cells counted FISH (Bld/Tiss)Cells.chromosome 12 trisomy/Cells counted in Blood or Tissue by FISHCells.Chr 12 Ts/Cells NFr Bld/T FISHCells.chromosome 12 trisomy/Cells countedMOLPATH.TRISOMYCells.chromosome 12 trisomy/Cells Counted, Blood or tissue specimenNFr

Frequently asked questions

Code details

Code84913-3

SystemLOINC

Display nameCells.chromosome 12 trisomy/Cells counted FISH (Bld/Tiss)

DescriptionCells.chromosome 12 trisomy/Cells counted

Short nameCells.Chr 12 Ts/Cells NFr Bld/T FISH

ComponentCells.chromosome 12 trisomy/Cells counted

PropertyNFr

TimingPt

System (specimen)Bld/Tiss

ScaleQn

MethodFISH

ClassMOLPATH.TRISOMY

Example units%

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.58

Last changed2.61

Consumer names

Cells.chromosome 12 trisomy/Cells Counted, Blood or tissue specimen

Part names

Cells.chromosome 12 trisomy/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.