LOINCActiveBoth

LOINC Code 56372-6: Western Ragweed IgG4 (S) [Mass/Vol]

56372-6 is a LOINC code used to identify Western Ragweed IgG4 (S) [Mass/Vol] 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 Ambrosia psilostachya Ab.IgG4. 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 Ambrosia psilostachya Ab.IgG4. 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

What it does not mean

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

Key facts

  • Western Ragweed IgG4 Ab [Mass/volume] in Serum
  • Ambrosia psilostachya Ab.IgG4
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Level; Mass concentration; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; w002; w2; West Ragweed; Western ragweed

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

Western Ragweed IgG4 (S) [Mass/Vol]Western Ragweed IgG4 Ab [Mass/volume] in SerumWest Ragweed IgG4-mCncAmbrosia psilostachya Ab.IgG4ALLERGYWestern ragweed IgG4 antibodyMCnc

Frequently asked questions

Code details

Code56372-6
SystemLOINC
Display nameWestern Ragweed IgG4 (S) [Mass/Vol]
DescriptionAmbrosia psilostachya Ab.IgG4
Short nameWest Ragweed IgG4-mCnc
ComponentAmbrosia psilostachya Ab.IgG4
PropertyMCnc
TimingPt
System (specimen)Ser
ScaleQn
ClassALLERGY
Example unitsug/mL
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.73

Consumer names

Western ragweed IgG4 antibody

Part names

Ambrosia psilostachya Ab.IgG4MCncPtSerQnWestern Ragweed (Ambrosia psilostachya) IgG4Mass ConcentrationPoint in time (spot)Serum

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 56372-6 | HealthAssure