LOINCActiveObservation

LOINC Code 5956-8: Coagulation (PPP control) [Time]

5956-8 is a LOINC code used to identify Coagulation (PPP control) [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^Control.

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^Control.

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 normal 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 normal plasma in Platelet poor plasma from Control by Coagulation assay
Coagulation
Clot; Clottable; Coag; Coagulation assay; Contrl; Control; Fac; Fact; Hematology; Heme; Immediatedly after 11 addition of; Normal; Plas; Platelet poor plasma; Point in time; PT imm NP; 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 (PPP control) [Time]Prothrombin time (PT) factor substitution immediately after addition of normal plasma in Platelet poor plasma from Control by Coagulation assayPT imm NP PPP ContCoagulationCOAGCoagulation, control BloodTime

Frequently asked questions

Code details

Code5956-8
SystemLOINC
Display nameCoagulation (PPP control) [Time]
DescriptionCoagulation
Short namePT imm NP PPP Cont
ComponentCoagulation
PropertyTime
TimingPt
System (specimen)PPP^Control
ScaleQn
MethodCoag.tissue factor induced.factor substitution.immediately after addition of normal plasma
ClassCOAG
Example unitss
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0d
Last changed2.82

Consumer names

Coagulation, control Blood

Part names

CoagulationTimePtPPP^controlQnCoag.tissue factor induced.factor substitution.immediately after addition of normal plasmaTime (e.g. seconds)Point in time (spot)Platelet poor plasma^ControlProthrombin time (PT) factor substitution immediately after addition of normal 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.

LOINC Code 5956-8 | HealthAssure