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LOINC Code 63539-1: Proteinase 3 Ab Qn (Body fld)

63539-1 is a LOINC code used to identify Proteinase 3 Ab Qn (Body fld) 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 Proteinase 3 Ab. It is commonly used with the system or sample type Body fld.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Proteinase 3 Ab. It is commonly used with the system or sample type Body fld.

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

What it does not mean

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

Key facts

  • Proteinase 3 Ab [Units/volume] in Body fluid
  • Proteinase 3 Ab
  • ABS; Aby; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; B/F; BF; bod; Bodies; Body fluid; Body fluid, unsp; Fl; Fld; FLU; Fluid; III; Point in time; PR3; PR-3; PR3-ANCA; Proteinase3; PRTN3; QNT; Quan; Quant; Quantitative; Random; Serine protease 3; Serology; Vasculitis

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

Proteinase 3 Ab Qn (Body fld)Proteinase 3 Ab [Units/volume] in Body fluidProteinase3 Ab Fld-aCncProteinase 3 AbSEROProteinase 3 antibody, Body fluidACnc

Frequently asked questions

Code details

Code63539-1
SystemLOINC
Display nameProteinase 3 Ab Qn (Body fld)
DescriptionProteinase 3 Ab
Short nameProteinase3 Ab Fld-aCnc
ComponentProteinase 3 Ab
PropertyACnc
TimingPt
System (specimen)Body fld
ScaleQn
ClassSERO
Example unitsarb U/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.36
Last changed2.70

Consumer names

Proteinase 3 antibody, Body fluid

Part names

Proteinase 3 AbACncPtBody fldQnArbitrary ConcentrationPoint in time (spot)Body fluid

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.