LOINCActiveBoth

LOINC Code 77683-1: Thrombin activatable fibrinolysis inhibitor Chromogenic method Qn (PPP)

77683-1 is a LOINC code used to identify Thrombin activatable fibrinolysis inhibitor Chromogenic 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 Thrombin activatable fibrinolysis inhibitor. 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 Thrombin activatable fibrinolysis inhibitor. 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: Chromo

What it does not mean

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

Key facts

  • Thrombin activatable fibrinolysis inhibitor [Units/volume] in Platelet poor plasma by Chromogenic method
  • Thrombin activatable fibrinolysis inhibitor
  • This term was created for, but not limited in use to, the submitter's Roche, STAGO, STACHROM TAFI test kit, using a synthetic chromogenic substrate method.
  • Arbitrary concentration; Chromogenic assay; COAGULATION; ENZY; Enzymatic assay; Hematology; Heme; Inhib; Inhibit; Plas; Platelet poor plasma; Point in time; Procarboxypeptidase B; Procarboxypeptidase R; Procarboxypeptidase U; QNT; Quan; Quant; Quantitative; Random; TAFI; Throm

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

Thrombin activatable fibrinolysis inhibitor Chromogenic method Qn (PPP)Thrombin activatable fibrinolysis inhibitor [Units/volume] in Platelet poor plasma by Chromogenic methodTAFI PPP Chro-aCncThrombin activatable fibrinolysis inhibitorCOAGThrombin activatable fibrinolysis inhibitor, BloodACnc

Frequently asked questions

Code details

Code77683-1
SystemLOINC
Display nameThrombin activatable fibrinolysis inhibitor Chromogenic method Qn (PPP)
DescriptionThrombin activatable fibrinolysis inhibitor
Short nameTAFI PPP Chro-aCnc
ComponentThrombin activatable fibrinolysis inhibitor
PropertyACnc
TimingPt
System (specimen)PPP
ScaleQn
MethodChromo
ClassCOAG
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.52
Last changed2.52

Consumer names

Thrombin activatable fibrinolysis inhibitor, Blood

Part names

Thrombin activatable fibrinolysis inhibitorACncPtPPPQnChromoArbitrary ConcentrationPoint in time (spot)Platelet poor plasmaChromogenic (Enzyme)

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.