LOINCActiveObservation

LOINC Code 102647-5: Walnut IgE RAST (S) [Presence]

102647-5 is a LOINC code used to identify 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 spp 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 spp 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

  • Walnut IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)
  • Juglans spp Ab.IgE
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; f256; Immune globulin E; Immunoglobulin E; Juglans sp; Point in time; PR; Radioallergosorbent test; Random; Serum; SmQn; SR; Walnut; Walnuts

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

Walnut IgE RAST (S) [Presence]Walnut IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)Walnut IgE RASTJuglans spp Ab.IgEALLERGYWalnut allergy testPrThr

Frequently asked questions

Code details

Code102647-5
SystemLOINC
Display nameWalnut IgE RAST (S) [Presence]
DescriptionJuglans spp Ab.IgE
Short nameWalnut IgE RAST
ComponentJuglans spp 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

Walnut allergy test

Part names

Juglans spp Ab.IgEPrThrPtSerSemiQnRASTWalnut (Juglans spp) 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 102647-5 | HealthAssure