LOINCActiveObservation

LOINC Code 28657-5: Coagulation factor X activated actual/normal Chromogenic method (PPP) [Rel catalytic activity/Vol]

28657-5 is a LOINC code used to identify Coagulation factor X activated actual/normal Chromogenic method (PPP) [Rel catalytic activity/Vol] 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 Coagulation factor X activated actual/Normal. 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 Coagulation factor X activated actual/Normal. 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: Observation
  • Method: Chromo

What it does not mean

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

Key facts

  • Coagulation factor X activated actual/normal in Platelet poor plasma by Chromogenic method
  • Coagulation factor X activated actual/Normal
  • Act/Nor; Activ; Autoprothrombin III; Chromogenic assay; Coag; Control; ENZY; Enzymatic assay; Fac; Fact; Fact X; Fact Xa; Factor 10; FX; FXa; Hematology; Heme; Plas; Platelet poor plasma; Point in time; Prothrombokinase; QNT; Quan; Quant; Quantitative; Random; RlCCnc; Stuart-prower factor

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

Coagulation factor X activated actual/normal Chromogenic method (PPP) [Rel catalytic activity/Vol]Coagulation factor X activated actual/normal in Platelet poor plasma by Chromogenic methodFact Xa Act/Nor PPP ChroCoagulation factor X activated actual/NormalCOAGCoagulation Factor X Activated actual/normal, BloodRelCCnc

Frequently asked questions

Code details

Code28657-5
SystemLOINC
Display nameCoagulation factor X activated actual/normal Chromogenic method (PPP) [Rel catalytic activity/Vol]
DescriptionCoagulation factor X activated actual/Normal
Short nameFact Xa Act/Nor PPP Chro
ComponentCoagulation factor X activated actual/Normal
PropertyRelCCnc
TimingPt
System (specimen)PPP
ScaleQn
MethodChromo
ClassCOAG
Example units%
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.73

Consumer names

Coagulation Factor X Activated actual/normal, Blood

Part names

Coagulation factor X activated actual/NormalRelCCncPtPPPQnChromoRelative catalytic 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 28657-5 | HealthAssure