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.

LOINCActiveObservation

LOINC Code 18-2: Amoxicillin SBT (Isol+S)

Name: LOINC Code 18-2: Amoxicillin SBT (Isol+S)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T11:17:27.584Z

18-2 is a LOINC code used to identify Amoxicillin SBT (Isol+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 Amoxicillin. It is commonly used with the system or sample type Isolate+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 Amoxicillin. It is commonly used with the system or sample type Isolate+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: SBT

What it does not mean

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

Key facts

Amoxicillin [Susceptibility] by Serum bactericidal titer
Amoxicillin
Amox; Amoxicilloyl; Amoxil; ANTIBIOTIC SUSCEPTIBILITIES; Bristamox; c204; c6; Dilution factor; Dilution Factor (Titer); ID; Infectious Disease; InfectiousDisease; Islt; Isol; Larotid; Moxalin; Point in time; Polymox; Random; Sequence based typing; Serum; SERUM BACTERICIDAL TITER; Serum killing test; SmQn; SR; Sumox; Titer; Titered; Titre; Trimox; Ttr; Wymox

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

Amoxicillin SBT (Isol+S)Amoxicillin [Susceptibility] by Serum bactericidal titerAmoxicillin Titr SBTAmoxicillinABXBACTSusceptibility to AmoxicillinTitr

Frequently asked questions

Code details

Code18-2

SystemLOINC

Display nameAmoxicillin SBT (Isol+S)

DescriptionAmoxicillin

Short nameAmoxicillin Titr SBT

ComponentAmoxicillin

PropertyTitr

TimingPt

System (specimen)Isolate+Ser

ScaleSemiQn

MethodSBT

ClassABXBACT

Example unitstiter

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.75

Consumer names

Susceptibility to Amoxicillin

Part names

AmoxicillinTitrPtIsolate+SerSemiQnSBTTiterPoint in time (spot)Isolate and SerumSerum bactericidal titer

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.