What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActiveBoth

LOINC Code 73737-9: Phospholipase A2 receptor IgG IA Qn (S)

Name: LOINC Code 73737-9: Phospholipase A2 receptor IgG IA Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:52.635Z

73737-9 is a LOINC code used to identify Phospholipase A2 receptor IgG IA Qn (S) 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 Phospholipase A2 receptor Ab.IgG. It is commonly used with the system or sample type Ser.

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 Phospholipase A2 receptor Ab.IgG. It is commonly used with the system or sample type Ser.

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

Phospholipase A2 receptor IgG Ab [Units/volume] in Serum by Immunoassay
Phospholipase A2 receptor Ab.IgG
Phospholipase A2 Receptor (PLA2R) antibodies in human serum can be quantitatively measured in relative units (rU) by immunoassays. Such antibodies are found in patients with idiopathic membranous glomerulonephritis (MGN) but not in patients with secondary glomerulonephritis. The test is used to differentiate these two conditions.
ABS; Aby; Antby; Anti; Antibodies; Antibody; Anti-PLA2R; Arbitrary concentration; Autoantibodies; Autoantibody; EIA; ELFA; ELISA; Enzyme immunoassay; IAA; Immune globulin G; Immunoglobulin G; k203; MEIA; Membranous Glomerulonephritis; Membranous Nephropathy; nApi m 1 Phospholipase A2, Bee; PLA2R; Point in time; QNT; Quan; Quant; Quantitative; Random; Rec; Recept; Receptors; Recp; Recptr; Rk203; Serology; Serum; SR; SUDS

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

Phospholipase A2 receptor IgG IA Qn (S)Phospholipase A2 receptor IgG Ab [Units/volume] in Serum by ImmunoassayPLA2R IgG Ser IA-aCncPhospholipase A2 receptor Ab.IgGSEROPhospholipase A2 Receptor IgG antibody, BloodACnc

Frequently asked questions

Code details

Code73737-9

SystemLOINC

Display namePhospholipase A2 receptor IgG IA Qn (S)

DescriptionPhospholipase A2 receptor Ab.IgG

Short namePLA2R IgG Ser IA-aCnc

ComponentPhospholipase A2 receptor Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIA

ClassSERO

Example unitsarb U/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.44

Last changed2.73

Consumer names

Phospholipase A2 Receptor IgG antibody, Blood

Part names

Phospholipase A2 receptor Ab.IgGACncPtSerQnIAPhospholipase A2 receptor IgGArbitrary ConcentrationPoint in time (spot)SerumImmunoassay

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.