LOINC Code 73749-4: 4p16.3 chromosome del FISH Nom (Bld/Tiss)

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 4p16.3 chromosome deletion. 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: Both
• Method: FISH

What it does not mean

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

Key facts

• 4p16.3 chromosome deletion [Identifier] in Blood or Tissue by FISH Nominal
• 4p16.3 chromosome deletion
• FISH studies are performed to detect a deletion on the short arm of chromosome 4 (4p16.3) in patients, primarily newborns, suspected of having Wolf-Hirschhorn syndrome (WHS). FISH signal pattern indicating a loss of 4p16.3 is consistent with a diagnosis of WHS.
• Blood; Chromosom; Chromosomes; Del; Deletions; Fluorescent in situ hybridization; Genetics; Heredity; Heritable; Identity or presence; Inherited; Molecular pathology; MOLPATH; MOLPATH.DELETIONS; Nominal; Point in time; Random; Tissue; Tissue, unspecified; 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

Frequently asked questions