LOINCActiveBoth

LOINC Code 34571-0: Coagulation aPTT.lupus sensitive (PPP) [Time]

34571-0 is a LOINC code used to identify Coagulation aPTT.lupus sensitive (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. 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. 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.surface induced.lupus sensitive

What it does not mean

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

Key facts

  • aPTT.lupus sensitive (LA screen)
  • Coagulation
  • aPTT; aPTT-LA; Clot; Clottable; Coag; Coagulation assay; Hematology; Heme; Plas; Platelet poor plasma; Point in time; QNT; Quan; Quant; Quantitative; Random; 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 aPTT.lupus sensitive (PPP) [Time]aPTT.lupus sensitive (LA screen)Screen aPTTCoagulationCOAGCoagulation, BloodTime

Frequently asked questions

Code details

Code34571-0
SystemLOINC
Display nameCoagulation aPTT.lupus sensitive (PPP) [Time]
DescriptionCoagulation
Short nameScreen aPTT
ComponentCoagulation
PropertyTime
TimingPt
System (specimen)PPP
ScaleQn
MethodCoag.surface induced.lupus sensitive
ClassCOAG
Example unitss
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.10
Last changed2.82

Consumer names

Coagulation, Blood

Part names

CoagulationTimePtPPPQnCoag.surface induced.lupus sensitiveTime (e.g. seconds)Point in time (spot)Platelet poor plasmaaPTT.lupus sensitive

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.

LOINC Code 34571-0 | HealthAssure