LOINCActiveBoth

LOINC Code 21300-9: G. lamblia IgA IF (S) [Titer]

21300-9 is a LOINC code used to identify G. lamblia IgA IF (S) [Titer] 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 Giardia lamblia Ab.IgA. It is commonly used with the system or sample type Ser.

Reviewed by HealthAssure Clinical TeamUpdated 25 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 Giardia lamblia Ab.IgA. 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: Both
  • Method: IF

What it does not mean

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

Key facts

  • Giardia lamblia IgA Ab [Titer] in Serum by Immunofluorescence
  • Giardia lamblia Ab.IgA
  • ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Autoantibodies; Autoantibody; Beaver fever; Dilution factor; Dilution Factor (Titer); FA; Fluorescent antibody; Fluoresent; G duodenalis; G intestinalis; G lamblia; Giardiasis; ID; IFA; Immune fluorescence; Immune globulin A; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin A; Infectious Disease; InfectiousDisease; Lamblia intestinalis; Microbiology; Point in time; Random; Serum; SmQn; SR; Time Resolved Fluorescence; Titer; Titered; Titre; TRF; Ttr

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

G. lamblia IgA IF (S) [Titer]Giardia lamblia IgA Ab [Titer] in Serum by ImmunofluorescenceG lamblia IgA Titr Ser IFGiardia lamblia Ab.IgAMICROGiardia lamblia IgA antibody, BloodTitr

Frequently asked questions

Code details

Code21300-9
SystemLOINC
Display nameG. lamblia IgA IF (S) [Titer]
DescriptionGiardia lamblia Ab.IgA
Short nameG lamblia IgA Titr Ser IF
ComponentGiardia lamblia Ab.IgA
PropertyTitr
TimingPt
System (specimen)Ser
ScaleSemiQn
MethodIF
ClassMICRO
Example unitstiter
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

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

Consumer names

Giardia lamblia IgA antibody, Blood

Part names

Giardia lamblia Ab.IgATitrPtSerSemiQnIFGiardia lamblia IgATiterPoint in time (spot)SerumImmunofluorescence (IF)

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 21300-9 | HealthAssure