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LOINC

LOINC Code 5951-9: aPTT.factor substitution immediately after addition of normal plasma Tilt tube (PPP control) [Time]

5951-9 is a LOINC code used to identify aPTT.factor substitution immediately after addition of normal plasma Tilt tube (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 surface induced.factor substitution^immediately after addition of normal plasma. 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 surface induced.factor substitution^immediately after addition of normal plasma. 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: DEPRECATED
  • Method: Tilt tube

What it does not mean

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

Key facts

Deprecated Activated partial thrombplastin time (aPTT).factor substitution in Platelet poor plasma from control by Coagulation assay --immediately after addition of normal plasma
Coagulation surface induced.factor substitution^immediately after addition of normal plasma
Activated partial thromboplastin time; aPTT; aPTT correction study; Coag; Contrl; Control; Fac; Fact; Hematology; Heme; imm NP; Immediatedly after 11 addition of; Little(A)PTT; Mixing studies; Normal; Partial Thromboplastin Time; Plas; Platelet poor plasma; Point in time; PTT; QNT; Quan; Quant; Quantitative; Random; Surf

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

aPTT.factor substitution immediately after addition of normal plasma Tilt tube (PPP control) [Time]Deprecated Activated partial thrombplastin time (aPTT).factor substitution in Platelet poor plasma from control by Coagulation assay --immediately after addition of normal plasmaDeprecated aPTT imm NP PPP Cont QnCoagulation surface induced.factor substitution^immediately after addition of normal plasmaCOAGaPTT.factor substitution immediately after addition of Normal Plasma, control BloodTime

Frequently asked questions

Code details

Code5951-9
SystemLOINC
Display nameaPTT.factor substitution immediately after addition of normal plasma Tilt tube (PPP control) [Time]
DescriptionCoagulation surface induced.factor substitution^immediately after addition of normal plasma
Short nameDeprecated aPTT imm NP PPP Cont Qn
ComponentCoagulation surface induced.factor substitution^immediately after addition of normal plasma
PropertyTime
TimingPt
System (specimen)PPP^Control
ScaleQn
MethodTilt tube
ClassCOAG
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0d
Last changed2.36

Consumer names

aPTT.factor substitution immediately after addition of Normal Plasma, control Blood

Part names

Coagulation surface induced.factor substitution^immediately after addition of normal plasmaTimePtPPP^controlQnTilt tubeTime (e.g. seconds)Point in time (spot)Platelet poor plasma^Control

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.