LOINCActiveBoth

LOINC Code 27816-8: vWf Ag actual/normal IA (PPP) [Relative mass conc]

27816-8 is a LOINC code used to identify vWf Ag actual/normal IA (PPP) [Relative mass conc] 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 actual/Normal. 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 actual/Normal. 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: IA

What it does not mean

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

Key facts

von Willebrand factor (vWf) Ag actual/normal in Platelet poor plasma by Immunoassay
von Willebrand factor Ag actual/Normal
Act/Nor; Ag Act/Nor; Antigen; Antigens; COAGULATION; Control; EIA; ELFA; ELISA; Enzyme immunoassay; Fac; Fact; Hematology; Heme; IAA; MEIA; Plas; Platelet poor plasma; Point in time; QNT; Quan; Quant; Quantitative; Random; Relative mass concentration; RLMCNC; SUDS; UniversalLabOrders; 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 actual/normal IA (PPP) [Relative mass conc]von Willebrand factor (vWf) Ag actual/normal in Platelet poor plasma by ImmunoassayvWF Ag Act/Nor PPP IAvon Willebrand factor Ag actual/NormalCOAGvWf antigen activity, BloodRelMCnc

Frequently asked questions

Code details

Code27816-8
SystemLOINC
Display namevWf Ag actual/normal IA (PPP) [Relative mass conc]
Descriptionvon Willebrand factor Ag actual/Normal
Short namevWF Ag Act/Nor PPP IA
Componentvon Willebrand factor Ag actual/Normal
PropertyRelMCnc
TimingPt
System (specimen)PPP
ScaleQn
MethodIA
ClassCOAG
Example units%
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.73

Consumer names

vWf antigen activity, Blood

Part names

von Willebrand factor Ag actual/NormalRelMCncPtPPPQnIAvon Willebrand factor (vWf) Ag actual/NormalRelative Mass ConcentrationPoint in time (spot)Platelet poor plasmaImmunoassay

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 27816-8 | HealthAssure