LOINCActiveObservation

LOINC Code 103021-2: S. aureus TSST-1 IgE RAST (S) [Presence]

103021-2 is a LOINC code used to identify S. aureus TSST-1 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 Staphylococcus aureus TSST-1 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 Staphylococcus aureus TSST-1 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

  • Staphylococcus aureus TSST-1 IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)
  • Staphylococcus aureus TSST-1 Ab.IgE
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; i; Immune globulin E; Immunoglobulin E; m226; o71; Point in time; PR; Radioallergosorbent test; Random; Rm226; S aureus; Serum; SmQn; SR; St a TSST; Staph

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

S. aureus TSST-1 IgE RAST (S) [Presence]Staphylococcus aureus TSST-1 IgE Ab [Presence] in Serum by Radioallergosorbent test (RAST)S aureus TSST-1 IgE RASTStaphylococcus aureus TSST-1 Ab.IgEALLERGYStaphylococcus aureus TSST-1 allergy testPrThr

Frequently asked questions

Code details

Code103021-2
SystemLOINC
Display nameS. aureus TSST-1 IgE RAST (S) [Presence]
DescriptionStaphylococcus aureus TSST-1 Ab.IgE
Short nameS aureus TSST-1 IgE RAST
ComponentStaphylococcus aureus TSST-1 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

Staphylococcus aureus TSST-1 allergy test

Part names

Staphylococcus aureus TSST-1 Ab.IgEPrThrPtSerSemiQnRASTStaphylococcus aureus TSST-1 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 103021-2 | HealthAssure