LOINCActiveObservation

LOINC Code 18955-5: Nitrofurantoin [Susc]

18955-5 is a LOINC code used to identify Nitrofurantoin [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 Nitrofurantoin. 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 Nitrofurantoin. 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

What it does not mean

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

Key facts

  • Nitrofurantoin [Susceptibility]
  • Nitrofurantoin
  • ANTIBIOTIC SUSCEPTIBILITIES; AST; Furadantin; ID; Infectious Disease; InfectiousDisease; Islt; Isol; Macrobid; Macrodantin; Nitrofurant; Point in time; 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

Nitrofurantoin [Susc]Nitrofurantoin [Susceptibility]Nitrofurantoin Susc IsltNitrofurantoinABXBACTSusceptibility to NitrofurantoinSusc

Frequently asked questions

Code details

Code18955-5
SystemLOINC
Display nameNitrofurantoin [Susc]
DescriptionNitrofurantoin
Short nameNitrofurantoin Susc Islt
ComponentNitrofurantoin
PropertySusc
TimingPt
System (specimen)Isolate
ScaleOrdQn
ClassABXBACT
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0l
Last changed2.73

Consumer names

Susceptibility to Nitrofurantoin

Part names

NitrofurantoinSuscPtIsolateOrdQnSusceptibility (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.

LOINC Code 18955-5 | HealthAssure