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.

LOINCActiveBoth

LOINC Code 671-8: Microscopic observation Methylene blue stain.Loeffler Nom (Specimen)

Name: LOINC Code 671-8: Microscopic observation Methylene blue stain.Loeffler Nom (Specimen)
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:46.215Z

671-8 is a LOINC code used to identify Microscopic observation Methylene blue stain.Loeffler Nom (Specimen) 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 Observation. It is commonly used with the system or sample type XXX.

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 Observation. It is commonly used with the system or sample type XXX.

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: Both
Method: Methylene blue stain.Loeffler

What it does not mean

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

Key facts

Microscopic observation [Identifier] in Specimen by Methylene blue stain.Loeffler
Observation
ID; Identity or presence; Infectious Disease; InfectiousDisease; Loeffler MB Stn; MB Stn; Microbiology; Misc; Miscellaneous; Nominal; Other; Point in time; Random; Spec; St; Stains; Stn; To be specified in another part of the message; Unspecified

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

Microscopic observation Methylene blue stain.Loeffler Nom (Specimen)Microscopic observation [Identifier] in Specimen by Methylene blue stain.LoefflerLoeffler MB Stn SpecObservationMICROMicroscopic observation, SpecimenPrid

Frequently asked questions

Code details

Code671-8

SystemLOINC

Display nameMicroscopic observation Methylene blue stain.Loeffler Nom (Specimen)

DescriptionObservation

Short nameLoeffler MB Stn Spec

ComponentObservation

PropertyPrid

TimingPt

System (specimen)XXX

ScaleNom

MethodMethylene blue stain.Loeffler

ClassMICRO

StatusACTIVE

Order/ObservationBoth

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released1.0

Last changed2.78

Consumer names

Microscopic observation, Specimen

Part names

ObservationPridPtXXXNomMethylene blue stain.LoefflerPresence or IdentityPoint 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.