LOINC Code 75978-7: Chr 18 trisomy Dosage of chromosome-specific cfDNA Ql (cfDNA) [Interp]

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 chromosome 18 trisomy. 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: Dosage of chromosome specific cf DNA

What it does not mean

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

Key facts

• Fetal Chromosome 18 trisomy [Interpretation] based on Plasma cell-free DNA by Dosage of chromosome-specific cfDNA Qualitative
• Fetal chromosome 18 trisomy
• The interpretation of chromosome 18 aneuploidy (e.g., consistent with diploid, suspected trisomy or consistent with trisomy 18) based on non-invasive prenatal screening methods using cfDNA in maternal plasma.
• Chr 18 Ts; Chromosom; Chromosomes; Genetics; Heredity; Heritable; Impression; Impression/interpretation of study; Impressions; Inherited; Interp; Interpretation; Molecular pathology; MOLPATH; MOLPATH.TRISOMY; Ordinal; Pl; Plasma; Plsm; Point in time; QL; Qual; Qualitative; Random; Screen; Spec; Ts

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

Frequently asked questions