LOINCActiveObservation

LOINC Code 63068-1: TOP2A gene copy num/Chromosome 17 copy number FISH (Tiss) [# ratio]

63068-1 is a LOINC code used to identify TOP2A gene copy num/Chromosome 17 copy number FISH (Tiss) [# ratio] 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 TOP2A gene copy number/Chromosome 17 copy number. It is commonly used with the system or sample type 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 TOP2A gene copy number/Chromosome 17 copy number. It is commonly used with the system or sample type 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

  • TOP2A gene copy number/Chromosome 17 copy number in Tissue by FISH
  • TOP2A gene copy number/Chromosome 17 copy number
  • CEP17; Chr 17 copy num; Chromosom; Chromosome 17 centromere; Chromosome Enumeration Probe 17; Chromosomes; DNA topoisomerase II, 170 kD; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; Inherited; Molecular pathology; MOLPATH; No; Num; Number ratio; Point in time; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified; TOP2; TOP22; TOP2A copy num; topoisomerase (DNA) II alpha 170kDa; TP2A

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

TOP2A gene copy num/Chromosome 17 copy number FISH (Tiss) [# ratio]TOP2A gene copy number/Chromosome 17 copy number in Tissue by FISHTOP2A copy num/Chr 17 copy num Tiss FISHTOP2A gene copy number/Chromosome 17 copy numberMOLPATHTOP2A gene copy number/Chromosome 17 copy number, TissueNRto

Frequently asked questions

Code details

Code63068-1
SystemLOINC
Display nameTOP2A gene copy num/Chromosome 17 copy number FISH (Tiss) [# ratio]
DescriptionTOP2A gene copy number/Chromosome 17 copy number
Short nameTOP2A copy num/Chr 17 copy num Tiss FISH
ComponentTOP2A gene copy number/Chromosome 17 copy number
PropertyNRto
TimingPt
System (specimen)Tiss
ScaleQn
MethodFISH
ClassMOLPATH
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.66

Consumer names

TOP2A gene copy number/Chromosome 17 copy number, Tissue

Part names

TOP2A gene copy number/Chromosome 17 copy numberNRtoPtTissQnFISHNumber RatioPoint in time (spot)Tissue and SmearsFluorescent 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.