LOINCActiveObservation

LOINC Code 16979-7: HIV 1 p24 Ag Qn (CSF)

16979-7 is a LOINC code used to identify HIV 1 p24 Ag Qn (CSF) 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 CSF.

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 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: Observation

What it does not mean

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

Key facts

  • HIV 1 p24 Ag [Units/volume] in Cerebral spinal fluid
  • HIV 1 p24 Ag
  • AIDS; Antigen; Antigens; Arbitrary concentration; Cerebral spinal fluid; Cerebrospinal Fl; HIV type 1; HIV type I; HIV1; HIV1 p24; Human immunodeficiency virus; i; ID; Infectious Disease; InfectiousDisease; Microbiology; Neuro; Neurology; Point in time; QNT; Quan; Quant; Quantitative; Random; Spinal Fl; Spinal Fld; Spinal Flu; Spinal Fluid

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 Qn (CSF)HIV 1 p24 Ag [Units/volume] in Cerebral spinal fluidHIV1 p24 Ag CSF-aCncHIV 1 p24 AgMICROHIV 1 P24 antigen, Spinal fluidACnc

Frequently asked questions

Code details

Code16979-7
SystemLOINC
Display nameHIV 1 p24 Ag Qn (CSF)
DescriptionHIV 1 p24 Ag
Short nameHIV1 p24 Ag CSF-aCnc
ComponentHIV 1 p24 Ag
PropertyACnc
TimingPt
System (specimen)CSF
ScaleQn
ClassMICRO
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.69

Consumer names

HIV 1 P24 antigen, Spinal fluid

Part names

HIV 1 p24 AgACncPtCSFQnArbitrary ConcentrationPoint in time (spot)Cerebral spinal fluid

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 16979-7 | HealthAssure