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.

LOINCObservation

LOINC Code 77319-2: Miscellaneous allergen IgE RAST class (S)

Name: LOINC Code 77319-2: Miscellaneous allergen IgE RAST class (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:57.647Z

77319-2 is a LOINC code used to identify Miscellaneous allergen IgE RAST class (S) 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 Allergen.miscellaneous Ab.IgE.RAST class. 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 Allergen.miscellaneous Ab.IgE.RAST class. 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: DEPRECATED
Order vs observation: Observation

What it does not mean

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

Key facts

Deprecated Miscellaneous allergen IgE Ab RAST class [Units/volume] in Serum
Allergen.miscellaneous Ab.IgE.RAST class
ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Alrgen; Antby; Anti; Antibodies; Antibody; Arbitrary concentration; Autoantibodies; Autoantibody; IgE RAST; Immune globulin E; Immunoglobulin E; Misc Allergen; Misc allergen IgE; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

Miscellaneous allergen IgE RAST class (S)Deprecated Miscellaneous allergen IgE Ab RAST class [Units/volume] in SerumDeprecated Misc Allergen IgE RAST QnAllergen.miscellaneous Ab.IgE.RAST classALLERGYMiscellaneous allergen allergy testACnc

Frequently asked questions

Code details

Code77319-2

SystemLOINC

Display nameMiscellaneous allergen IgE RAST class (S)

DescriptionAllergen.miscellaneous Ab.IgE.RAST class

Short nameDeprecated Misc Allergen IgE RAST Qn

ComponentAllergen.miscellaneous Ab.IgE.RAST class

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

ClassALLERGY

Example unitskIU/L

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.52

Last changed2.54

Consumer names

Miscellaneous allergen allergy test

Part names

Allergen.miscellaneous Ab.IgE.RAST classACncPtSerQnArbitrary 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.