LOINC Code 40438-4: HIV 1 gp41 Ab IA Ql

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 HIV 1 gp41 Ab. It is commonly used with the system or sample type Ser/Plas.

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: IA

What it does not mean

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

Key facts

• HIV 1 gp41 Ab [Presence] in Serum or Plasma by Immunoassay
• HIV 1 gp41 Ab
• ABS; Aby; AIDS; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; EIA; ELFA; ELISA; Enzyme immunoassay; HIV type 1; HIV type I; HIV1; HIV1 gp41; Human immunodeficiency virus; i; IAA; ID; Infectious Disease; InfectiousDisease; MEIA; Microbiology; Ordinal; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SerP; SerPl; SerPlas; Serum; Serum or plasma; SR; SUDS

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