LOINC Code 46718-3: Aquaporin 4 water channel IgG Ql (CSF)

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 Aquaporin 4 water channel Ab.IgG. It is commonly used with the system or sample type CSF.

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

• Aquaporin 4 water channel IgG Ab [Presence] in Cerebral spinal fluid
• Aquaporin 4 water channel Ab.IgG
• ABS; Aby; Antby; Anti; Antibodies; Antibody; AQP4; AQP4 H2O channel; Autoantibodies; Autoantibody; Cerebral spinal fluid; Cerebrospinal Fl; Devic's disease; Immune globulin G; Immunoglobulin G; Neuromyelitis optica; NMO; NMO spectrum disorders; NMOSD; Opticospinal multiple sclerosis; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; Serology; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid; Water channel aquaporin-4

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