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.

LOINC

LOINC Code 5896-5: Prothrombin index Coag-inverse ratio (P) [Time ratio]

Name: LOINC Code 5896-5: Prothrombin index Coag-inverse ratio (P) [Time ratio]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:39.276Z

5896-5 is a LOINC code used to identify Prothrombin index Coag-inverse ratio (P) [Time 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 Coagulation tissue factor induced.normal/Actual. It is commonly used with the system or sample type Plas.

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 tissue factor induced.normal/Actual. It is commonly used with the system or sample type Plas.

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: DEPRECATED
Method: Coag-inverse ratio

What it does not mean

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

Key facts

Deprecated reverse INR in Platelet poor plasma by Coagulation assay
Coagulation tissue factor induced.normal/Actual
Clot; Clottable; Coag; Coagulation assay; Control; Fac; Fact; Hematology; Heme; Pl; Plasma; Plsm; Point in time; Pro time; Prothrombin time; Prothrombin time inverse ratio; Protime; Protime inverse ratio; PT; PT index; PT inverse ratio; QNT; Quan; Quant; Quantitative; Random; Tilt tube; Time ratio

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

Prothrombin index Coag-inverse ratio (P) [Time ratio]Deprecated reverse INR in Platelet poor plasma by Coagulation assayDeprecated PT Inv Ratio PlasCoagulation tissue factor induced.normal/ActualCOAGProthrombin index, BloodTRto

Frequently asked questions

Code details

Code5896-5

SystemLOINC

Display nameProthrombin index Coag-inverse ratio (P) [Time ratio]

DescriptionCoagulation tissue factor induced.normal/Actual

Short nameDeprecated PT Inv Ratio Plas

ComponentCoagulation tissue factor induced.normal/Actual

PropertyTRto

TimingPt

System (specimen)Plas

ScaleQn

MethodCoag-inverse ratio

ClassCOAG

StatusDEPRECATED

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.36

Consumer names

Prothrombin index, Blood

Part names

Coagulation tissue factor induced.normal/ActualTRtoPtPlasQnCoag-inverse ratioProthrombin indexTime RatioPoint in time (spot)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.