LOINCActiveBoth

LOINC Code 40847-6: Brome IgG4 (S) [Mass/Vol]

40847-6 is a LOINC code used to identify Brome 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 Bromus inermis 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 Bromus inermis 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

  • Brome IgG4 Ab [Mass/volume] in Serum
  • Bromus inermis Ab.IgG4
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Brome; Brome grass; g011; g11; Level; Mass concentration; Point in time; QNT; Quan; Quant; Quantitative; Random; Rescue grass; Serum; SR

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

Brome IgG4 (S) [Mass/Vol]Brome IgG4 Ab [Mass/volume] in SerumBrome IgG4-mCncBromus inermis Ab.IgG4ALLERGYBrome IgG4 antibodyMCnc

Frequently asked questions

Code details

Code40847-6
SystemLOINC
Display nameBrome IgG4 (S) [Mass/Vol]
DescriptionBromus inermis Ab.IgG4
Short nameBrome IgG4-mCnc
ComponentBromus inermis 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 released2.15
Last changed2.73

Consumer names

Brome IgG4 antibody

Part names

Bromus inermis Ab.IgG4MCncPtSerQnBrome (Bromus inermis) 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 40847-6 | HealthAssure