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 99454-1: C. tetani toxoid IgG (S) [Mass/Vol]

Name: LOINC Code 99454-1: C. tetani toxoid IgG (S) [Mass/Vol]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.065Z

99454-1 is a LOINC code used to identify C. tetani toxoid IgG (S) [Mass/Vol] 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

What it does not mean

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

Key facts

Clostridium tetani toxoid IgG Ab [Mass/volume] in Serum
Clostridium tetani toxoid Ab.IgG
ABS; Aby; Antby; Anti; Antibodies; Antibody; Autoantibodies; Autoantibody; C tetani; C tetani Toxoid; c12; c208; Immune globulin G; Immunoglobulin G; Level; Mass concentration; Microbiology; Point in time; QNT; Quan; Quant; Quantitative; Random; Rc208; Serum; SR; Tet; Tetanus; Tetanus toxoid; 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 (S) [Mass/Vol]Clostridium tetani toxoid IgG Ab [Mass/volume] in SerumC tetani Toxoid IgG Ser-mCncClostridium tetani toxoid Ab.IgGMICROClostridium tetani toxoid IgG antibody, BloodMCnc

Frequently asked questions

Code details

Code99454-1

SystemLOINC

Display nameC. tetani toxoid IgG (S) [Mass/Vol]

DescriptionClostridium tetani toxoid Ab.IgG

Short nameC tetani Toxoid IgG Ser-mCnc

ComponentClostridium tetani toxoid Ab.IgG

PropertyMCnc

TimingPt

System (specimen)Ser

ScaleQn

ClassMICRO

Example unitsmg/L

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Consumer names

Clostridium tetani toxoid IgG antibody, Blood

Part names

Clostridium tetani toxoid Ab.IgGMCncPtSerQnClostridium tetani toxoid IgGMass 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.