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LOINC Code 81746-0: 17p13.1 del FISH Doc (Bld/Tiss)

81746-0 is a LOINC code used to identify 17p13.1 del FISH Doc (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 Chromosome region 17p13.1 deletion. 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 Chromosome region 17p13.1 deletion. 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

Chromosome region 17p13.1 deletion in Blood or Tissue by FISH
Chromosome region 17p13.1 deletion
Deletions at 17p13.1 involving the TP53 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. 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 p53 (17p13.1) probe, which targets the TP53 gene and flanking regions.
Blood; Chr 17p13.1; Chr 17p13.1 del; Chromosom; Chromosomes; Cyto loc; Del; Deletions; Document; Finding; Findings; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; Inherited; Molecular pathology; MOLPATH; MOLPATH.DELDUP; Point in time; Random; 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

17p13.1 del FISH Doc (Bld/Tiss)Chromosome region 17p13.1 deletion in Blood or Tissue by FISHChr 17p13.1 Del Bld/T FISHChromosome region 17p13.1 deletionMOLPATH.DELDUP17p13.1 deletion analysis, Blood or tissue specimenFind

Frequently asked questions

Code details

Code81746-0
SystemLOINC
Display name17p13.1 del FISH Doc (Bld/Tiss)
DescriptionChromosome region 17p13.1 deletion
Short nameChr 17p13.1 Del Bld/T FISH
ComponentChromosome region 17p13.1 deletion
PropertyFind
TimingPt
System (specimen)Bld/Tiss
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

17p13.1 deletion analysis, Blood or tissue specimen

Part names

Chromosome region 17p13.1 deletionFindPtBld/TissDocFISHFindingPoint 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.