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 27438-1: Protein C Ag/Coagulation factor VII Ag IA (PPP) [Mass ratio]

Name: LOINC Code 27438-1: Protein C Ag/Coagulation factor VII Ag IA (PPP) [Mass ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:14.571Z

27438-1 is a LOINC code used to identify Protein C Ag/Coagulation factor VII Ag IA (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 Ag/Coagulation factor VII Ag. 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 Protein C Ag/Coagulation factor VII Ag. 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: IA

What it does not mean

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

Key facts

Protein C Ag/Coagulation factor VII Ag [Mass Ratio] in Platelet poor plasma by Immunoassay
Protein C Ag/Coagulation factor VII Ag
Antigen; Antigens; Autoprothrombin II-a; Coag; EIA; ELFA; ELISA; Enzyme immunoassay; F7; Fac; Fact; Fact VII; Factor 7; FVII; Hematology; Heme; IAA; Mass concentration ratio; Mass ratio; MCRto; MEIA; PC; Plas; Platelet poor plasma; Point in time; PR; Proconvertin; Prot; Prot C; QNT; Quan; Quant; Quantitative; Random; Rh; Rh Blood Group System; Serum prothrombin conversion accelerator; SPCA; SUDS

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

Protein C Ag/Coagulation factor VII Ag IA (PPP) [Mass ratio]Protein C Ag/Coagulation factor VII Ag [Mass Ratio] in Platelet poor plasma by ImmunoassayProt C Ag/Fact VII Ag PPP IAProtein C Ag/Coagulation factor VII AgCOAGProtein C Antigen/Coagulation Factor VII Antigen, BloodMRto

Frequently asked questions

Code details

Code27438-1

SystemLOINC

Display nameProtein C Ag/Coagulation factor VII Ag IA (PPP) [Mass ratio]

DescriptionProtein C Ag/Coagulation factor VII Ag

Short nameProt C Ag/Fact VII Ag PPP IA

ComponentProtein C Ag/Coagulation factor VII Ag

PropertyMRto

TimingPt

System (specimen)PPP

ScaleQn

MethodIA

ClassCOAG

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.73

Consumer names

Protein C Antigen/Coagulation Factor VII Antigen, Blood

Part names

Protein C Ag/Coagulation factor VII AgMRtoPtPPPQnIAMass RatioPoint in time (spot)Platelet poor plasmaImmunoassay

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.