LOINCActiveBoth

LOINC Code 80659-6: ACT Kaolin activated time (Bld)

80659-6 is a LOINC code used to identify ACT Kaolin activated time (Bld) 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 Activated clotting time. It is commonly used with the system or sample type Bld.

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 Activated clotting time. It is commonly used with the system or sample type Bld.

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: Coag.kaolin induced

What it does not mean

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

Key facts

  • Activated clotting time (ACT) of Blood induced by Kaolin
  • Activated clotting time
  • The activated clotting time (ACT) of blood is a measure of the amount of time for a fibrin clot to form in the presence of a known amount of kaolin activator.
  • ACT; Activ; Activated coagulation time; Blood; Clot; Clot tm; Clottable; COAGULATION; Coagulation activated; Coagulation assay; Coagulation time; Hematology; Heme; KCT; Point in time; QNT; Quan; Quant; Quantitative; Random; Rate; R-time; Tilt tube; WB; Whole blood

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

ACT Kaolin activated time (Bld)Activated clotting time (ACT) of Blood induced by KaolinACT Bld KCTActivated clotting timeCOAGActivated clotting time, BloodTime

Frequently asked questions

Code details

Code80659-6
SystemLOINC
Display nameACT Kaolin activated time (Bld)
DescriptionActivated clotting time
Short nameACT Bld KCT
ComponentActivated clotting time
PropertyTime
TimingPt
System (specimen)Bld
ScaleQn
MethodCoag.kaolin induced
ClassCOAG
Example unitss
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.56
Last changed2.82

Consumer names

Activated clotting time, Blood

Part names

Activated clotting timeTimePtBldQnCoag.kaolin inducedActivated clotting time (ACT)Time (e.g. seconds)Point in time (spot)BloodKaolin activated time

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 80659-6 | HealthAssure