LOINC

LOINC Code 6660-5: Microscopic observation Dark field examination Nom (Tiss)

6660-5 is a LOINC code used to identify Microscopic observation Dark field examination Nom (Tiss) 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 Microscopic observation. It is commonly used with the system or sample type Tiss.

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 Microscopic observation. It is commonly used with the system or sample type Tiss.

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: DEPRECATED
  • Method: Dark field examination

What it does not mean

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

Key facts

  • Deprecated Microscopic observation [Identifier] in Tissue by Dark field examination
  • Microscopic observation
  • Darkfield; ID; Identity or presence; Infectious Disease; InfectiousDisease; Microbiology; Nominal; Point in time; Random; Tissue; Tissue, 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 Dark field examination Nom (Tiss)Deprecated Microscopic observation [Identifier] in Tissue by Dark field examinationDeprecated Dark Field TissMicroscopic observationMICROMicroscopic observation, TissuePrid

Frequently asked questions

Code details

Code6660-5
SystemLOINC
Display nameMicroscopic observation Dark field examination Nom (Tiss)
DescriptionMicroscopic observation
Short nameDeprecated Dark Field Tiss
ComponentMicroscopic observation
PropertyPrid
TimingPt
System (specimen)Tiss
ScaleNom
MethodDark field examination
ClassMICRO
StatusDEPRECATED

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0g
Last changed2.36

Consumer names

Microscopic observation, Tissue

Part names

Microscopic observationPridPtTissNomDark field examinationPresence or IdentityPoint in time (spot)Tissue and Smears

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 6660-5 | HealthAssure