What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 49639-8: Protein C/Coagulation factor X (PPP) [Mass ratio]

Name: LOINC Code 49639-8: Protein C/Coagulation factor X (PPP) [Mass ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

49639-8 is a LOINC code used to identify Protein C/Coagulation factor X (PPP) [Mass ratio] 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 Protein C/Coagulation factor X. It is commonly used with the system or sample type PPP.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Protein C/Coagulation factor X. 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

What it does not mean

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

Key facts

Protein C/Coagulation factor X [Mass Ratio] in Platelet poor plasma
Protein C/Coagulation factor X
Autoprothrombin II-a; Autoprothrombin III; Coag; Fac; Fact; Fact X; Factor 10; FX; Hematology; Heme; Mass concentration ratio; Mass ratio; MCRto; PC; Plas; Platelet poor plasma; Point in time; PR; Prot; Prot C; Prothrombokinase; QNT; Quan; Quant; Quantitative; Random; 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.

Related SNOMED CT concepts

705114005SNOMED CT mapping for Protein C/Coagulation factor X (PPP) [Mass ratio] (49639-8)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Protein C/Coagulation factor X (PPP) [Mass ratio]Protein C/Coagulation factor X [Mass Ratio] in Platelet poor plasmaProt C/Fact X PPPProtein C/Coagulation factor XCOAGProtein C/Coagulation Factor X, BloodMRto

Frequently asked questions

Code details

Code49639-8

SystemLOINC

Display nameProtein C/Coagulation factor X (PPP) [Mass ratio]

DescriptionProtein C/Coagulation factor X

Short nameProt C/Fact X PPP

ComponentProtein C/Coagulation factor X

PropertyMRto

TimingPt

System (specimen)PPP

ScaleQn

ClassCOAG

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.22

Last changed2.42

Consumer names

Protein C/Coagulation Factor X, Blood

Part names

Protein C/Coagulation factor XMRtoPtPPPQnMass RatioPoint in time (spot)Platelet poor plasma

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.