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.

LOINCObservation

LOINC Code 23817-0: Other Antibiotic peak MLC (Isol+S) [Susc]

Name: LOINC Code 23817-0: Other Antibiotic peak MLC (Isol+S) [Susc]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:12.417Z

23817-0 is a LOINC code used to identify Other Antibiotic peak MLC (Isol+S) [Susc] 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 Antibiotic XXX^peak. 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 Antibiotic XXX^peak. 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: DEPRECATED
Order vs observation: Observation
Method: MLC

What it does not mean

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

Key facts

Deprecated Other Antibiotic [Susceptibility] by Minimum lethal concentration (MLC) --peak
Antibiotic XXX^peak
Can be any antibiotic
ANTIBIOTIC SUSCEPTIBILITIES; AST; ID; Infectious Disease; InfectiousDisease; Islt; Isol; MBC; Minimum bactericidal concentration; Minimum lethal concentration; Ordinal; Other Antibiotic; Point in time; Post; Postdose; Post-dose; QL; Qual; Qualitative; Random; Screen; Serum; SR; Sus; Suscept; Susceptibilities; Susceptibility; Susceptibilty

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

Other Antibiotic peak MLC (Isol+S) [Susc]Deprecated Other Antibiotic [Susceptibility] by Minimum lethal concentration (MLC) --peakDeprecated Other Antibiotic Peak MLCAntibiotic XXX^peakABXBACTSusceptibility to Other antibiotic--PeakSusc

Frequently asked questions

Code details

Code23817-0

SystemLOINC

Display nameOther Antibiotic peak MLC (Isol+S) [Susc]

DescriptionAntibiotic XXX^peak

Short nameDeprecated Other Antibiotic Peak MLC

ComponentAntibiotic XXX^peak

PropertySusc

TimingPt

System (specimen)Isolate+Ser

ScaleOrd

MethodMLC

ClassABXBACT

StatusDEPRECATED

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0n

Last changed2.36

Consumer names

Susceptibility to Other antibiotic--Peak

Part names

Antibiotic XXX^peakSuscPtIsolate+SerOrdMLCSusceptibility (microorganisms)Point in time (spot)Isolate and SerumMinimum lethal concentration (MLC)

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.