LOINC Code 35455-5: X chromosome inactivation Nar (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 X chromosome inactivation. 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

What it does not mean

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

Key facts

• X chromosome inactivation [Identifier] in Blood or Tissue Narrative
• X chromosome inactivation
• Blood; Chromosom; Chromosomes; Identity or presence; Molecular pathology; MOLPATH; Narrative; Point in time; Random; Report; Tissue; Tissue, unspecified; WB; Whole blood; Whole blood or Tissue; X Chrom Inactivation

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