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.

LOINCActiveBoth

LOINC Code 58770-9: C. tetani toxoid IgG IF Qn (S)

Name: LOINC Code 58770-9: C. tetani toxoid IgG IF Qn (S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:39.276Z

58770-9 is a LOINC code used to identify C. tetani toxoid IgG IF Qn (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 Clostridium tetani toxoid Ab.IgG. 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 Clostridium tetani toxoid Ab.IgG. 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

Clostridium tetani toxoid IgG Ab [Units/volume] in Serum by Immunofluorescence
Clostridium tetani toxoid Ab.IgG
ABS; Aby; ACIF; Antby; Anti; Antibodies; Antibody; Anticomplement Immunofluorescence; Arbitrary concentration; Autoantibodies; Autoantibody; C tetani; C tetani Toxoid; c12; c208; FA; Fluorescent antibody; Fluoresent; ID; IFA; Immune fluorescence; Immune globulin G; Immunoflour; Immunofluor; Immunofluorescence; Immunoglobulin G; Infectious Disease; InfectiousDisease; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Rc208; Serum; SR; Tet; Tetanus; Tetanus toxoid; Time Resolved Fluorescence; TRF; Ttx

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

C. tetani toxoid IgG IF Qn (S)Clostridium tetani toxoid IgG Ab [Units/volume] in Serum by ImmunofluorescenceC tetani Toxoid IgG Ser IF-aCncClostridium tetani toxoid Ab.IgGMICROClostridium tetani toxoid IgG antibody, BloodACnc

Frequently asked questions

Code details

Code58770-9

SystemLOINC

Display nameC. tetani toxoid IgG IF Qn (S)

DescriptionClostridium tetani toxoid Ab.IgG

Short nameC tetani Toxoid IgG Ser IF-aCnc

ComponentClostridium tetani toxoid Ab.IgG

PropertyACnc

TimingPt

System (specimen)Ser

ScaleQn

MethodIF

ClassMICRO

Example unitsIU/mL

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.32

Last changed2.70

Consumer names

Clostridium tetani toxoid IgG antibody, Blood

Part names

Clostridium tetani toxoid Ab.IgGACncPtSerQnIFClostridium tetani toxoid IgGArbitrary ConcentrationPoint 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.