LOINCActiveBoth

LOINC Code 3174-0: Antithrombin Chromogenic method Qn (PPP)

3174-0 is a LOINC code used to identify Antithrombin 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 Antithrombin. 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 Antithrombin. 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

  • Antithrombin [Units/volume] in Platelet poor plasma by Chromogenic method
  • Antithrombin
  • Anti thrombin; Antithrm; Antithrombin III; Antithrombn; Arbitrary concentration; AT; AT III; ATIII; Chromogenic assay; COAGULATION; ENZY; Enzymatic assay; Hematology; Heme; Heparin cofactor I; Plas; Platelet poor plasma; Point in time; QNT; Quan; Quant; Quantitative; Random; Thrombin inhibitor I; UniversalLabOrders

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

Antithrombin Chromogenic method Qn (PPP)Antithrombin [Units/volume] in Platelet poor plasma by Chromogenic methodAT III PPP Chro-aCncAntithrombinCOAGAntithrombin, BloodACnc

Frequently asked questions

Code details

Code3174-0
SystemLOINC
Display nameAntithrombin Chromogenic method Qn (PPP)
DescriptionAntithrombin
Short nameAT III PPP Chro-aCnc
ComponentAntithrombin
PropertyACnc
TimingPt
System (specimen)PPP
ScaleQn
MethodChromo
ClassCOAG
Example unitsarb U/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Antithrombin, Blood

Part names

AntithrombinACncPtPPPQnChromoArbitrary 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.

LOINC Code 3174-0 | HealthAssure