What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCBoth

LOINC Code 5979-0: Plasminogen activator inhibitor 2 Ag Immunologic method Qn (PPP)

Name: LOINC Code 5979-0: Plasminogen activator inhibitor 2 Ag Immunologic method Qn (PPP)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:39.744Z

5979-0 is a LOINC code used to identify Plasminogen activator inhibitor 2 Ag Immunologic method Qn (PPP) 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 Plasminogen activator inhibitor 2 Ag. It is commonly used with the system or sample type PPP.

Reviewed by HealthAssure Clinical TeamUpdated 21 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 Plasminogen activator inhibitor 2 Ag. It is commonly used with the system or sample type PPP.

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: DEPRECATED
Order vs observation: Both
Method: Imm

What it does not mean

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

Key facts

Deprecated Plasminogen activator inhibitor 2 Ag [Units/volume] in Platelet poor plasma by Immunologic method
Plasminogen activator inhibitor 2 Ag
Antigen; Antigens; Arbitrary concentration; COAGULATION; Endothelial cell type PA-I; Fast acting PAI; Hematology; Heme; II; Immunol; Immunology; Immunology?; Inhib; Inhibit; PAI; PAI 2; PAI2; PA-inhibitor; PA-inhibitor 2; Placental PA-I; Plas; Platelet PAI; Platelet poor plasma; PLG; PLGN; Point in time; Profibrinolysin; QNT; Quan; Quant; Quantitative; Random; t-PA inhibitor; u-PA inhibitor

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

Plasminogen activator inhibitor 2 Ag Immunologic method Qn (PPP)Deprecated Plasminogen activator inhibitor 2 Ag [Units/volume] in Platelet poor plasma by Immunologic methodDeprecated PAI2 Ag PPP Imm-aCncPlasminogen activator inhibitor 2 AgCOAGPlasminogen activator inhibitor 2 antigen, BloodACnc

Frequently asked questions

Code details

Code5979-0

SystemLOINC

Display namePlasminogen activator inhibitor 2 Ag Immunologic method Qn (PPP)

DescriptionPlasminogen activator inhibitor 2 Ag

Short nameDeprecated PAI2 Ag PPP Imm-aCnc

ComponentPlasminogen activator inhibitor 2 Ag

PropertyACnc

TimingPt

System (specimen)PPP

ScaleQn

MethodImm

ClassCOAG

StatusDEPRECATED

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0d

Last changed2.69

Consumer names

Plasminogen activator inhibitor 2 antigen, Blood

Part names

Plasminogen activator inhibitor 2 AgACncPtPPPQnImmArbitrary ConcentrationPoint in time (spot)Platelet poor plasmaImmunologic

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.