LOINCActiveObservation

LOINC Code 77015-6: Trisomy 18 risk Sequencing Ql (cfDNA) [Interp]

77015-6 is a LOINC code used to identify Trisomy 18 risk Sequencing Ql (cfDNA) [Interp] 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 Fetal trisomy 18 risk. It is commonly used with the system or sample type Plas.cfDNA.

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 Fetal trisomy 18 risk. It is commonly used with the system or sample type Plas.cfDNA.

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: Sequencing

What it does not mean

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

Key facts

  • Fetal Trisomy 18 risk [Interpretation] based on Plasma cell-free DNA by Sequencing Qualitative
  • Fetal trisomy 18 risk
  • This term was created for, but is not limited in use to, Sequenom Laboratories' VisibiliT Trisomy 18 test, which analyzes circulating cell-free DNA extracted from maternal plasma using whole genome sequencing to determine the risk for fetal chromosome 18 aneuploidy. VisibiliT is indicated for use in pregnant women with average risk for fetal chromosomal aneuploidy.
  • Edward syndrome; Genetics; Heredity; Heritable; high-throughput sequencing; HTS; Impression; Impression/interpretation of study; Impressions; Inherited; Interp; Interpretation; Molecular pathology; MOLPATH; MOLPATH.TRISOMY; Next generation sequencing; NGS; Ordinal; Pl; Plasma; Plsm; Point in time; QL; Qual; Qualitative; Random; Screen; T18 risk; Ts; Ts 18 risk

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

Trisomy 18 risk Sequencing Ql (cfDNA) [Interp]Fetal Trisomy 18 risk [Interpretation] based on Plasma cell-free DNA by Sequencing QualitativeFet Ts 18 risk Plas.cfDNA QlFetal trisomy 18 riskMOLPATH.TRISOMYImpPt

Frequently asked questions

Code details

Code77015-6
SystemLOINC
Display nameTrisomy 18 risk Sequencing Ql (cfDNA) [Interp]
DescriptionFetal trisomy 18 risk
Short nameFet Ts 18 risk Plas.cfDNA Ql
ComponentFetal trisomy 18 risk
PropertyImp
TimingPt
System (specimen)Plas.cfDNA
ScaleOrd
MethodSequencing
ClassMOLPATH.TRISOMY
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.73

Consumer names

Fetal Trisomy 18 risk

Part names

Fetal trisomy 18 riskImpPtPlas.cfDNAOrdSequencingImpression/interpretation of studyPoint in time (spot)Plasma cell-free DNA

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.

LOINC Code 77015-6 | HealthAssure