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 43306-0: Chr 21 trisomy Cytogenetics (Bld/Tiss) [%]

Name: LOINC Code 43306-0: Chr 21 trisomy Cytogenetics (Bld/Tiss) [%]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:28.587Z

43306-0 is a LOINC code used to identify Chr 21 trisomy Cytogenetics (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 21 trisomy. 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 21 trisomy. 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: Observation
Method: Cytogenetics

What it does not mean

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

Key facts

Chromosome 21 trisomy [Percentile] by Cytogenetics
Chromosome 21 trisomy
Blood; Chr 21 Ts; Chromosom; Chromosomes; Cytog; Down syndrome; Downs; Genetics; Heredity; Heritable; Inherited; Karyotype; Molecular pathology; MOLPATH; MOLPATH.TRISOMY; Percentile; Point in time; Random; SmQn; 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

Chr 21 trisomy Cytogenetics (Bld/Tiss) [%]Chromosome 21 trisomy [Percentile] by CytogeneticsChr 21 Ts Prctl Bld/TChromosome 21 trisomyMOLPATH.TRISOMYChromosome 21 trisomy, Blood or tissue specimenPrctl

Frequently asked questions

Code details

Code43306-0

SystemLOINC

Display nameChr 21 trisomy Cytogenetics (Bld/Tiss) [%]

DescriptionChromosome 21 trisomy

Short nameChr 21 Ts Prctl Bld/T

ComponentChromosome 21 trisomy

PropertyPrctl

TimingPt

System (specimen)Bld/Tiss

ScaleSemiQn

MethodCytogenetics

ClassMOLPATH.TRISOMY

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.75

Consumer names

Chromosome 21 trisomy, Blood or tissue specimen

Part names

Chromosome 21 trisomyPrctlPtBld/TissSemiQnCytogeneticsPercentilePoint in time (spot)Blood or Tissue

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.