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 53222-6: Coagulation factor XI activity Coag Qn (PPP)

Name: LOINC Code 53222-6: Coagulation factor XI activity Coag Qn (PPP)
Creator: HealthAssure Clinical Team
Published: 2026-05-25T17:13:11.347Z

53222-6 is a LOINC code used to identify Coagulation factor XI activity Coag Qn (PPP) 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 activity. 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 Coagulation factor XI activity. 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: Coag

What it does not mean

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

Key facts

Coagulation factor XI activity [Units/volume] in Platelet poor plasma by Coagulation assay
Coagulation factor XI activity
Activ; Actvty; Antihemophilic factor C; Arbitrary concentration; Clot; Clottable; Coag; Coagulation assay; Fac; Fact; Fact XI; Factor 11; FXI; Hematology; Heme; Movements; Plas; Plasma thromboplastin antecedent; Platelet poor plasma; Point in time; PTA; QNT; Quan; Quant; Quantitative; Random; Tilt tube

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 Coagulation factor XI activity Coag Qn (PPP) (53222-6)

Related observations and tests

SNOMED_CT 705114005high

LOINC Code System

Source: LOINC-SNOMED cooperation package

Common synonyms

Coagulation factor XI activity Coag Qn (PPP)Coagulation factor XI activity [Units/volume] in Platelet poor plasma by Coagulation assayFact XI PPP-aCncCoagulation factor XI activityCOAGCoagulation Factor XI Activity, BloodACnc

Frequently asked questions

Code details

Code53222-6

SystemLOINC

Display nameCoagulation factor XI activity Coag Qn (PPP)

DescriptionCoagulation factor XI activity

Short nameFact XI PPP-aCnc

ComponentCoagulation factor XI activity

PropertyACnc

TimingPt

System (specimen)PPP

ScaleQn

MethodCoag

ClassCOAG

Example unitsarb U/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.24

Last changed2.82

Consumer names

Coagulation Factor XI Activity, Blood

Part names

Coagulation factor XI activityACncPtPPPQnCoagArbitrary ConcentrationPoint in time (spot)Platelet poor plasmaCoagulation 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.