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 56354-4: Pecan or Hickory Tree IgG4 (S) [Mass/Vol]

Name: LOINC Code 56354-4: Pecan or Hickory Tree IgG4 (S) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:38.260Z

56354-4 is a LOINC code used to identify Pecan or Hickory Tree 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 Carya illinoinensis tree 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 Carya illinoinensis tree 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

Pecan or Hickory Tree IgG4 Ab [Mass/volume] in Serum
Carya illinoinensis tree Ab.IgG4
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Carya pecan; Hickory; Level; Mass concentration; Pecan; Pecan pollen; Pecan/Hick; Pecan/Hick Tree; Point in time; QNT; Quan; Quant; Quantitative; Random; Serum; SR; t022; t22

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

Pecan or Hickory Tree IgG4 (S) [Mass/Vol]Pecan or Hickory Tree IgG4 Ab [Mass/volume] in SerumPecan/Hick Tree IgG4-mCncCarya illinoinensis tree Ab.IgG4ALLERGYPecan or hickory tree IgG4 antibodyMCnc

Frequently asked questions

Code details

Code56354-4

SystemLOINC

Display namePecan or Hickory Tree IgG4 (S) [Mass/Vol]

DescriptionCarya illinoinensis tree Ab.IgG4

Short namePecan/Hick Tree IgG4-mCnc

ComponentCarya illinoinensis tree 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

Pecan or hickory tree IgG4 antibody

Part names

Carya illinoinensis tree Ab.IgG4MCncPtSerQnPecan or Hickory Tree (Carya illinoinensis tree) 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.