LOINC

LOINC Code 13049-2: vWf Ag Immunologic method Qn (PPP)

13049-2 is a LOINC code used to identify vWf Ag Immunologic method Qn (PPP) 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 von Willebrand factor Ag. 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 von Willebrand factor Ag. 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: DEPRECATED
  • Method: Imm

What it does not mean

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

Key facts

Deprecated von Willebrand factor (vWf) Ag [Units/volume] in Platelet poor plasma by Immunologic method
von Willebrand factor Ag
Antigen; Antigens; Arbitrary concentration; COAGULATION; Fac; Fact; Hematology; Heme; Immunol; Immunology; Immunology?; Plas; Platelet poor plasma; Point in time; QNT; Quan; Quant; Quantitative; Random; Von will; Vonwillebrand; vWf; vWFAg

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

vWf Ag Immunologic method Qn (PPP)Deprecated von Willebrand factor (vWf) Ag [Units/volume] in Platelet poor plasma by Immunologic methodDeprecated vWF:Ag PPP Imm-aCncvon Willebrand factor AgCOAGvWf antigen, BloodACnc

Frequently asked questions

Code details

Code13049-2
SystemLOINC
Display namevWf Ag Immunologic method Qn (PPP)
Descriptionvon Willebrand factor Ag
Short nameDeprecated vWF:Ag PPP Imm-aCnc
Componentvon Willebrand factor Ag
PropertyACnc
TimingPt
System (specimen)PPP
ScaleQn
MethodImm
ClassCOAG
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0j-a
Last changed2.69

Consumer names

vWf antigen, Blood

Part names

von Willebrand factor AgACncPtPPPQnImmvon Willebrand factor (vWf) AgArbitrary ConcentrationPoint in time (spot)Platelet poor plasmaImmunologic

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 13049-2 | HealthAssure