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 43987-7: Clarithromycin Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL [Susc]

Name: LOINC Code 43987-7: Clarithromycin Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL [Susc]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:29.266Z

43987-7 is a LOINC code used to identify Clarithromycin Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL [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 Clarithromycin. It is commonly used with the system or sample type Isolate.

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 Clarithromycin. It is commonly used with the system or sample type Isolate.

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: Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL

What it does not mean

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

Key facts

Clarithromycin [Susceptibility] by Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL
Clarithromycin
AFB; ANTIBIOTIC SUSCEPTIBILITIES; AST; Biaxin; Claripen; Cnc; Conc; ID; Infectious Disease; InfectiousDisease; Islt; Isol; Klacid; mcg; Myco; Mycobacteria susceptibility; Mycobacterial susceptibility; Point in time; Random; SlowMyco; Sus; Suscept; Susceptibilities; Susceptibility; Susceptibilty; TB; Tuberculosis

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

Clarithromycin Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL [Susc]Clarithromycin [Susceptibility] by Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mLClarithro Islt Slgr Mcbct AB 12.0ClarithromycinABXBACTSusceptibility to ClarithromycinSusc

Frequently asked questions

Code details

Code43987-7

SystemLOINC

Display nameClarithromycin Method for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL [Susc]

DescriptionClarithromycin

Short nameClarithro Islt Slgr Mcbct AB 12.0

ComponentClarithromycin

PropertySusc

TimingPt

System (specimen)Isolate

ScaleOrdQn

MethodMethod for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mL

ClassABXBACT

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.17

Last changed2.82

Consumer names

Susceptibility to Clarithromycin

Part names

ClarithromycinSuscPtIsolateOrdQnMethod for Slow-growing mycobacteria.antibiotic concentration at 12.0 ug/mLSusceptibility (microorganisms)Point in time (spot)

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.