LOINCObservation

LOINC Code 15643-0: Clam IgE RAST class (S)

15643-0 is a LOINC code used to identify Clam 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 Ruditapes spp 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 Ruditapes spp 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 Clam IgE Ab RAST class [Presence] in Serum
  • Ruditapes spp Ab.IgE.RAST class
  • ABS; Aby; Allergen; Allergens; ALLERGY TESTING; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; Clam; f207; IgE RAST; Immune globulin E; Immunoglobulin E; Mollusc; Ordinal; Point in time; PR; QL; Qual; Qualitative; Random; Screen; 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

Clam IgE RAST class (S)Deprecated Clam IgE Ab RAST class [Presence] in SerumDeprecated Clam IgE RAST QlRuditapes spp Ab.IgE.RAST classALLERGYClam allergy testPrThr

Frequently asked questions

Code details

Code15643-0
SystemLOINC
Display nameClam IgE RAST class (S)
DescriptionRuditapes spp Ab.IgE.RAST class
Short nameDeprecated Clam IgE RAST Ql
ComponentRuditapes spp Ab.IgE.RAST class
PropertyPrThr
TimingPt
System (specimen)Ser
ScaleOrd
ClassALLERGY
StatusDEPRECATED
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.75

Consumer names

Clam allergy test

Part names

Ruditapes spp Ab.IgE.RAST classPrThrPtSerOrdPresence or ThresholdPoint 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.

LOINC Code 15643-0 | HealthAssure