LOINCActiveObservation

LOINC Code 350-9: Nalidixate MLC [Susc]

350-9 is a LOINC code used to identify Nalidixate MLC [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 Nalidixate. 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 Nalidixate. 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: MLC

What it does not mean

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

Key facts

  • Nalidixate [Susceptibility] by Minimum lethal concentration (MLC)
  • Nalidixate
  • ANTIBIOTIC SUSCEPTIBILITIES; AST; ID; Infectious Disease; InfectiousDisease; Islt; Isol; MBC; Minimum bactericidal concentration; Minimum lethal concentration; Nalidix; Nalidixic acid; NEG; Point in time; QNT; Quan; Quant; Quantitative; Random; 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

Nalidixate MLC [Susc]Nalidixate [Susceptibility] by Minimum lethal concentration (MLC)Nalidixate Islt MLCNalidixateABXBACTSusceptibility to NalidixateSusc

Frequently asked questions

Code details

Code350-9
SystemLOINC
Display nameNalidixate MLC [Susc]
DescriptionNalidixate
Short nameNalidixate Islt MLC
ComponentNalidixate
PropertySusc
TimingPt
System (specimen)Isolate
ScaleQn
MethodMLC
ClassABXBACT
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0
Last changed2.19

Consumer names

Susceptibility to Nalidixate

Part names

NalidixateSuscPtIsolateQnMLCSusceptibility (microorganisms)Point in time (spot)Minimum 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.

LOINC Code 350-9 | HealthAssure