LOINCActiveObservation

LOINC Code 33660-2: HIV 1 p24 Ag Neut test Ql

33660-2 is a LOINC code used to identify HIV 1 p24 Ag Neut test Ql in laboratory and clinical observation data. You may see this code in lab systems, lab reports, EHR exports, interoperability feeds, or other structured clinical data exchanges. LOINC codes identify tests, measurements, observations, survey items, and clinical questions in a standardized way. It is associated with the component HIV 1 p24 Ag. It is commonly used with the system or sample type Ser/Plas.

Reviewed by HealthAssure Clinical TeamUpdated 25 May 2026

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 p24 Ag. 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: Neut

What it does not mean

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

Key facts

  • HIV 1 p24 Ag [Presence] in Serum or Plasma by Neutralization test
  • HIV 1 p24 Ag
  • AIDS; Antigen; Antigens; Conventional virus neutralization test; cVNT; HIV type 1; HIV type I; HIV1; HIV1 p24; Human immunodeficiency virus; i; ID; Infectious Disease; InfectiousDisease; Microbiology; NEUTRALIZATION; Neutralization test; NT; Ordinal; Pl; Plasma; Plsm; Point in time; PR; QL; Qual; Qualitative; Random; Screen; SerP; SerPl; SerPlas; Serum; Serum or plasma; Serum virus neutralization; SR; SVN; Virus neutralization test; VNT

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

HIV 1 p24 Ag Neut test QlHIV 1 p24 Ag [Presence] in Serum or Plasma by Neutralization testHIV1 p24 Ag SerPl Ql NtHIV 1 p24 AgMICROHIV 1 P24 antigen, BloodPrThr

Frequently asked questions

Code details

Code33660-2
SystemLOINC
Display nameHIV 1 p24 Ag Neut test Ql
DescriptionHIV 1 p24 Ag
Short nameHIV1 p24 Ag SerPl Ql Nt
ComponentHIV 1 p24 Ag
PropertyPrThr
TimingPt
System (specimen)Ser/Plas
ScaleOrd
MethodNeut
ClassMICRO
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.09
Last changed2.70

Consumer names

HIV 1 P24 antigen, Blood

Part names

HIV 1 p24 AgPrThrPtSer/PlasOrdNeutPresence or ThresholdPoint in time (spot)Serum or PlasmaNeutralization test

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from LOINC. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.

LOINC Code 33660-2 | HealthAssure