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 40087-9: Coagulation 2 Hr pre Unsp challenge PT (PPP) [Time]

Name: LOINC Code 40087-9: Coagulation 2 Hr pre Unsp challenge PT (PPP) [Time]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:27.144Z

40087-9 is a LOINC code used to identify Coagulation 2 Hr pre Unsp challenge PT (PPP) [Time] 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^2H pre XXX challenge. 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^2H pre XXX challenge. 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: Coag.tissue factor induced

What it does not mean

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

Key facts

Prothrombin time (PT) in Platelet poor plasma by Coagulation assay --2 hours pre XXX challenge
Coagulation^2H pre XXX challenge
120 min; 120 minutes; 120min; 2 hours; 2h pre chal; Before; Clot; Clottable; Coag; Coagulation assay; Fac; Fact; Hematology; Heme; Plas; Platelet poor plasma; Point in time; pre chal; 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.

Common synonyms

Coagulation 2 Hr pre Unsp challenge PT (PPP) [Time]Prothrombin time (PT) in Platelet poor plasma by Coagulation assay --2 hours pre XXX challengePT 2h pre chal PPPCoagulation^2H pre XXX challengeCOAGCoagulation 2 hr before challenge, BloodTime

Frequently asked questions

Code details

Code40087-9

SystemLOINC

Display nameCoagulation 2 Hr pre Unsp challenge PT (PPP) [Time]

DescriptionCoagulation^2H pre XXX challenge

Short namePT 2h pre chal PPP

ComponentCoagulation^2H pre XXX challenge

PropertyTime

TimingPt

System (specimen)PPP

ScaleQn

MethodCoag.tissue factor induced

ClassCOAG

Example unitss

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.15

Last changed2.82

Consumer names

Coagulation 2 hr before challenge, Blood

Part names

Coagulation^2H pre XXX challengeTimePtPPPQnCoag.tissue factor inducedTime (e.g. seconds)Point in time (spot)Platelet poor plasmaProthrombin time (PT)

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.