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LOINC Code 101418-2: Microorganism level similarity to reference sample MS.MALDI-TOF (Islt/Spec) [Score]

101418-2 is a LOINC code used to identify Microorganism level similarity to reference sample MS.MALDI-TOF (Islt/Spec) [Score] 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 Microorganism level of similarity to reference sample. It is commonly used with the system or sample type Isolate/Specimen.

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 Microorganism level of similarity to reference sample. It is commonly used with the system or sample type Isolate/Specimen.

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: MS.MALDI-TOF

What it does not mean

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

Key facts

Microorganism level similarity to reference sample [Score] in Isolate or Specimen by MS.MALDI-TOF
Microorganism level of similarity to reference sample
The level of similarity score indicates how similar the result from an unknown sample is to a reference sample. A higher score indicates that identification is possible at the species level, versus an intermediate score that allows identification at the genus level. Low scores do not allow identification of the organism from the unknown sample. The specific scores at which genus- and species-level identification is possible vary by microorganism. [PMID28143403]
Islt; Islt/Spm; Isol; Levels; Levl; LV; LVL; Microbiology; Microorg lvl similar ref smpl; Microorganisms; Org; Organism; Organisms; Point in time; QNT; Quan; Quant; Quantitative; Random; Scale; Scre; Spec

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

Microorganism level similarity to reference sample MS.MALDI-TOF (Islt/Spec) [Score]Microorganism level similarity to reference sample [Score] in Isolate or Specimen by MS.MALDI-TOFMicroorg lvl sim ref smpl Islt/Spm MMicroorganism level of similarity to reference sampleMICROMicroorganism level similarity to reference sampleScore

Frequently asked questions

Code details

Code101418-2
SystemLOINC
Display nameMicroorganism level similarity to reference sample MS.MALDI-TOF (Islt/Spec) [Score]
DescriptionMicroorganism level of similarity to reference sample
Short nameMicroorg lvl sim ref smpl Islt/Spm M
ComponentMicroorganism level of similarity to reference sample
PropertyScore
TimingPt
System (specimen)Isolate/Specimen
ScaleQn
MethodMS.MALDI-TOF
ClassMICRO
Example unitsscore
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.74
Last changed2.75

Consumer names

Microorganism level similarity to reference sample

Part names

Microorganism level of similarity to reference sampleScorePtIsolate/SpecimenQnMS.MALDI-TOFMicroorganism level similarity to reference samplePoint in time (spot)Isolate or Specimen

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 101418-2 | HealthAssure