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 81749-4: 13q14 del FISH Doc (BM)

Name: LOINC Code 81749-4: 13q14 del FISH Doc (BM)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:05.776Z

81749-4 is a LOINC code used to identify 13q14 del FISH Doc (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 Chromosome region 13q14 deletion. 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 Chromosome region 13q14 deletion. 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

Chromosome region 13q14 deletion in Bone marrow by FISH

Chromosome region 13q14 deletion

Deletions at 13q14 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. Labs will report the number of cells that have the probe deletion out of total number of cells examined (e.g. 80 out of 100 cells, or 80%). Results are 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 13 (13q14) probe, which targets the RB1 gene and flanking regions.

BM; BON; Bone marrow; Chr 13q14; Chr 13q14 deletion; Chromosom; Chromosomes; Cyto loc; Del; Deletions; Document; Finding; Findings; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; Inherited; MAR; Marrow (bone); minimal angle of resolution; Minimum angle of resolution; Molecular pathology; MOLPATH; MOLPATH.DELDUP; Point in time; 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

13q14 del FISH Doc (BM)Chromosome region 13q14 deletion in Bone marrow by FISHChr 13q14 Del Mar FISHChromosome region 13q14 deletionMOLPATH.DELDUP13q14 deletion analysis, Bone marrowFind

Frequently asked questions

Code details

Code81749-4

SystemLOINC

Display name13q14 del FISH Doc (BM)

DescriptionChromosome region 13q14 deletion

Short nameChr 13q14 Del Mar FISH

ComponentChromosome region 13q14 deletion

PropertyFind

TimingPt

System (specimen)Bone mar

ScaleDoc

MethodFISH

ClassMOLPATH.DELDUP

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.56

Last changed2.66

Consumer names

13q14 deletion analysis, Bone marrow

Part names

Chromosome region 13q14 deletionFindPtBone marDocFISHFindingPoint 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.