LOINCActiveBoth

LOINC Code 3184-9: ACT Coag (Bld)

3184-9 is a LOINC code used to identify ACT Coag (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

What it does not mean

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

Key facts

  • Activated clotting time (ACT) of Blood by Coagulation assay
  • Activated clotting time
  • ACT; Activ; Activated coagulation time; Blood; Clot; Clot tm; Clottable; COAGULATION; Coagulation activated; Coagulation assay; Coagulation time; Hematology; Heme; Point in time; QNT; Quan; Quant; Quantitative; Random; Rate; R-time; Tilt tube; UniversalLabOrders; 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 Coag (Bld)Activated clotting time (ACT) of Blood by Coagulation assayACT BldActivated clotting timeCOAGActivated clotting time, BloodTime

Frequently asked questions

Code details

Code3184-9
SystemLOINC
Display nameACT Coag (Bld)
DescriptionActivated clotting time
Short nameACT Bld
ComponentActivated clotting time
PropertyTime
TimingPt
System (specimen)Bld
ScaleQn
MethodCoag
ClassCOAG
Example unitss
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Activated clotting time, Blood

Part names

Activated clotting timeTimePtBldQnCoagActivated clotting time (ACT)Time (e.g. seconds)Point in time (spot)BloodCoagulation assay

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 3184-9 | HealthAssure