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.

LOINCActiveObservation

LOINC Code 3229-2: Coagulation factor XI Ag actual/normal IA (PPP) [Relative mass conc]

Name: LOINC Code 3229-2: Coagulation factor XI Ag actual/normal IA (PPP) [Relative mass conc]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:18.900Z

3229-2 is a LOINC code used to identify Coagulation factor XI Ag actual/normal IA (PPP) [Relative mass conc] 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 XI Ag 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 XI Ag 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: IA

What it does not mean

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

Key facts

Coagulation factor XI Ag actual/normal in Platelet poor plasma by Immunoassay
Coagulation factor XI Ag actual/Normal
Act/Nor; Ag Act/Nor; Antigen; Antigens; Antihemophilic factor C; Coag; Control; EIA; ELFA; ELISA; Enzyme immunoassay; Fac; Fact; Fact XI; Factor 11; FXI; Hematology; Heme; IAA; MEIA; Plas; Plasma thromboplastin antecedent; Platelet poor plasma; Point in time; PTA; QNT; Quan; Quant; Quantitative; Random; Relative mass concentration; RLMCNC; 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

Coagulation factor XI Ag actual/normal IA (PPP) [Relative mass conc]Coagulation factor XI Ag actual/normal in Platelet poor plasma by ImmunoassayFact XI Ag Act/Nor PPP IACoagulation factor XI Ag actual/NormalCOAGCoagulation Factor XI antigen activity, BloodRelMCnc

Frequently asked questions

Code details

Code3229-2

SystemLOINC

Display nameCoagulation factor XI Ag actual/normal IA (PPP) [Relative mass conc]

DescriptionCoagulation factor XI Ag actual/Normal

Short nameFact XI Ag Act/Nor PPP IA

ComponentCoagulation factor XI Ag actual/Normal

PropertyRelMCnc

TimingPt

System (specimen)PPP

ScaleQn

MethodIA

ClassCOAG

Example units%

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.58

Consumer names

Coagulation Factor XI antigen activity, Blood

Part names

Coagulation factor XI Ag actual/NormalRelMCncPtPPPQnIARelative Mass ConcentrationPoint 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.