LOINCActiveBoth

LOINC Code 5991-5: Plasminogen Ag IA Qn (PPP)

5991-5 is a LOINC code used to identify Plasminogen Ag IA 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 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 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: ACTIVE
  • Order vs observation: Both
  • Method: IA

What it does not mean

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

Key facts

  • Plasminogen Ag [Units/volume] in Platelet poor plasma by Immunoassay
  • Plasminogen Ag
  • Antigen; Antigens; Arbitrary concentration; COAGULATION; EIA; ELFA; ELISA; Enzyme immunoassay; Hematology; Heme; IAA; MEIA; Plas; Platelet poor plasma; PLG; PLGN; Point in time; Profibrinolysin; QNT; Quan; Quant; Quantitative; Random; 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

Plasminogen Ag IA Qn (PPP)Plasminogen Ag [Units/volume] in Platelet poor plasma by ImmunoassayPLG Ag PPP IA-aCncPlasminogen AgCOAGPlasminogen antigen, BloodACnc

Frequently asked questions

Code details

Code5991-5
SystemLOINC
Display namePlasminogen Ag IA Qn (PPP)
DescriptionPlasminogen Ag
Short namePLG Ag PPP IA-aCnc
ComponentPlasminogen Ag
PropertyACnc
TimingPt
System (specimen)PPP
ScaleQn
MethodIA
ClassCOAG
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0d
Last changed2.73

Consumer names

Plasminogen antigen, Blood

Part names

Plasminogen AgACncPtPPPQnIAArbitrary ConcentrationPoint in time (spot)Platelet poor plasmaImmunoassay

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 5991-5 | HealthAssure