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 13058-3: Coagulation spec 2 aPTT (PPP) [Time]

Name: LOINC Code 13058-3: Coagulation spec 2 aPTT (PPP) [Time]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:23.608Z

13058-3 is a LOINC code used to identify Coagulation spec 2 aPTT (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^2nd specimen. 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^2nd specimen. 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.surface induced

What it does not mean

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

Key facts

aPTT in Platelet poor plasma by Coagulation assay --2nd specimen
Coagulation^2nd specimen
aPTT; Clot; Clottable; Coag; Coagulation assay; Convalescent; Hematology; Heme; Plas; Platelet poor plasma; Point in time; Post immunization; QNT; Quan; Quant; Quantitative; Random; Second; sp2; Spec; Surf; 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 spec 2 aPTT (PPP) [Time]aPTT in Platelet poor plasma by Coagulation assay --2nd specimenaPTT sp2 PPPCoagulation^2nd specimenCOAGCoagulation specimen 2, BloodTime

Frequently asked questions

Code details

Code13058-3

SystemLOINC

Display nameCoagulation spec 2 aPTT (PPP) [Time]

DescriptionCoagulation^2nd specimen

Short nameaPTT sp2 PPP

ComponentCoagulation^2nd specimen

PropertyTime

TimingPt

System (specimen)PPP

ScaleQn

MethodCoag.surface induced

ClassCOAG

Example unitss

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0j-a

Last changed2.82

Consumer names

Coagulation specimen 2, Blood

Part names

Coagulation^2nd specimenTimePtPPPQnCoag.surface inducedTime (e.g. seconds)Point in time (spot)Platelet poor plasmaaPTT

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.