LOINCActiveObservation

LOINC Code 102841-4: English Walnut IgE RAST (S) [Presence]

102841-4 is a LOINC code used to identify English Walnut IgE RAST (S) [Presence] 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 Juglans regia Ab.IgE. 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 Juglans regia Ab.IgE. 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: Observation
  • Method: RAST

What it does not mean

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

Key facts

  • English Walnut IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)
  • Juglans regia Ab.IgE
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; English walnut; Immune globulin E; Immunoglobulin E; Point in time; PR; Radioallergosorbent test; Random; Serum; SmQn; 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

English Walnut IgE RAST (S) [Presence]English Walnut IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)English Walnut IgE RASTJuglans regia Ab.IgEALLERGYEnglish walnut allergy testPrThr

Frequently asked questions

Code details

Code102841-4
SystemLOINC
Display nameEnglish Walnut IgE RAST (S) [Presence]
DescriptionJuglans regia Ab.IgE
Short nameEnglish Walnut IgE RAST
ComponentJuglans regia Ab.IgE
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleSemiQn
MethodRAST
ClassALLERGY
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.75
Last changed2.75

Consumer names

English walnut allergy test

Part names

Juglans regia Ab.IgEPrThrPtSerSemiQnRASTEnglish Walnut (Juglans regia) IgEPresence or ThresholdPoint in time (spot)SerumRadioallergosorbent test (RAST)

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 102841-4 | HealthAssure