HealthAssure
HealthAssureGood Life
LOINCActiveBoth

LOINC Code 91104-0: Coagulation Coagulation surface induced.factor sensitive with 1:1 Pooled Normal Plasma (PPP) [Time]

91104-0 is a LOINC code used to identify Coagulation Coagulation surface induced.factor sensitive with 1:1 Pooled Normal 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: Both
  • Method: Coag.surface induced.factor substitution with 1:1 Pooled Normal Plasma

What it does not mean

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

Key facts

aPTT.factor substitution with 11 Pooled Normal Plasma in Platelet poor plasma by Coagulation assay
Coagulation
Factor sensitive aPTT assays may be used to investigate prolonged conventional aPTT results. Factor sensitive reagents are sensitive to deficiencies in factor VIII, IX, XI and XII. If the factor sensitive aPTT result is prolonged, then further testing, including individual assays for each factor, are performed to determine the specific etiology of the clotting disorder. [PMID20880301]
aPTT; aPTT-FS; Clot; Clottable; Coag; Coagulation assay; Control; Fac; Fact; Hematology; Heme; i; Mixing aPTT; 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 Coagulation surface induced.factor sensitive with 1:1 Pooled Normal Plasma (PPP) [Time]aPTT.factor substitution with 1:1 Pooled Normal Plasma in Platelet poor plasma by Coagulation assayMixing aPTT PPPCoagulationCOAGCoagulation, BloodTime

Frequently asked questions

Code details

Code91104-0
SystemLOINC
Display nameCoagulation Coagulation surface induced.factor sensitive with 1:1 Pooled Normal Plasma (PPP) [Time]
DescriptionCoagulation
Short nameMixing aPTT PPP
ComponentCoagulation
PropertyTime
TimingPt
System (specimen)PPP
ScaleQn
MethodCoag.surface induced.factor substitution with 1:1 Pooled Normal Plasma
ClassCOAG
Example unitss
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.65
Last changed2.82

Consumer names

Coagulation, Blood

Part names

CoagulationTimePtPPPQnCoag.surface induced.factor substitution with 1:1 Pooled Normal PlasmaTime (e.g. seconds)Point in time (spot)Platelet poor plasmaCoagulation surface induced.factor sensitive with 1:1 Pooled 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 91104-0 | HealthAssure