LOINCActiveObservation

LOINC Code 34685-8: Coagulation Prothrombin time (PT) factor substitution immediately after addition of factor X depleted plasma (PPP) [Time]

34685-8 is a LOINC code used to identify Coagulation Prothrombin time (PT) factor substitution immediately after addition of factor X depleted plasma (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: Observation
  • Method: Coag.tissue factor induced.factor substitution.immediately after addition of factor X depleted plasma

What it does not mean

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

Key facts

Prothrombin time (PT) factor substitution immediately after addition of factor X depleted plasma in Platelet poor plasma by Coagulation assay
Coagulation
Clot; Clottable; Coag; Coagulation assay; Fac; Fact; Factor 10; FX; Hematology; Heme; Immediatedly after 11 addition of; Plas; Platelet poor plasma; Point in time; PT imm FX DP; 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 Prothrombin time (PT) factor substitution immediately after addition of factor X depleted plasma (PPP) [Time]Prothrombin time (PT) factor substitution immediately after addition of factor X depleted plasma in Platelet poor plasma by Coagulation assayPT imm FX DP PPPCoagulationCOAGCoagulation, BloodTime

Frequently asked questions

Code details

Code34685-8
SystemLOINC
Display nameCoagulation Prothrombin time (PT) factor substitution immediately after addition of factor X depleted plasma (PPP) [Time]
DescriptionCoagulation
Short namePT imm FX DP PPP
ComponentCoagulation
PropertyTime
TimingPt
System (specimen)PPP
ScaleQn
MethodCoag.tissue factor induced.factor substitution.immediately after addition of factor X depleted plasma
ClassCOAG
Example unitss
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.11
Last changed2.82

Consumer names

Coagulation, Blood

Part names

CoagulationTimePtPPPQnCoag.tissue factor induced.factor substitution.immediately after addition of factor X depleted plasmaTime (e.g. seconds)Point in time (spot)Platelet poor plasmaProthrombin time (PT) factor substitution immediately after addition of factor X depleted 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.