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.

LOINCActiveObservation

LOINC Code 93804-3: Chr 12 copy num/nucleus FISH (Tiss) [Entitic number]

Name: LOINC Code 93804-3: Chr 12 copy num/nucleus FISH (Tiss) [Entitic number]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:23.054Z

93804-3 is a LOINC code used to identify Chr 12 copy num/nucleus FISH (Tiss) [Entitic number] 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 12 copy number/nucleus. 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 Chromosome 12 copy number/nucleus. 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

Chromosome 12 copy number/nucleus in Tissue by FISH

Chromosome 12 copy number/nucleus

Aneusomy (varying number) of chromosome 12 is evaluated by using a DNA probe that marks the centromeric region of chromosome 12. Such a probe is also called CEP12. The ratio of the number of signals of the MDM2 gene, also on chromosome 12, to the chromosome 12 signal [LOINC93809-2] can indicate whether or not there is amplification of the MDM2 gene.

Chr 12 copy num; Chromosom; Chromosomes; Entitic; Entitic number; Fluorescent in situ hybridization; Molecular pathology; MOLPATH; No; Num; Point in time; QNT; Quan; Quant; Quantitative; Random; Tissue; Tissue, unspecified

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

Chr 12 copy num/nucleus FISH (Tiss) [Entitic number]Chromosome 12 copy number/nucleus in Tissue by FISHChr 12 copy num/nucleus EntNum Tiss FISHChromosome 12 copy number/nucleusMOLPATHChromosome 12 copy number/nucleus, TissueEntNum

Frequently asked questions

Code details

Code93804-3

SystemLOINC

Display nameChr 12 copy num/nucleus FISH (Tiss) [Entitic number]

DescriptionChromosome 12 copy number/nucleus

Short nameChr 12 copy num/nucleus EntNum Tiss FISH

ComponentChromosome 12 copy number/nucleus

PropertyEntNum

TimingPt

System (specimen)Tiss

ScaleQn

MethodFISH

ClassMOLPATH

Example units#

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.67

Last changed2.67

Consumer names

Chromosome 12 copy number/nucleus, Tissue

Part names

Chromosome 12 copy number/nucleusEntNumPtTissQnFISHEntitic numberPoint 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.