LOINCActiveBoth

LOINC Code 6661-3: Microscopic observation Dry mount Nom (Tiss)

6661-3 is a LOINC code used to identify Microscopic observation Dry mount 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 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 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: ACTIVE
  • Order vs observation: Both
  • Method: Dry mount

What it does not mean

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

Key facts

  • Microscopic observation [Identifier] in Tissue by Dry mount
  • Observation
  • 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 Dry mount Nom (Tiss)Microscopic observation [Identifier] in Tissue by Dry mountDry Mount TissObservationMICROMicroscopic observation, TissuePrid

Frequently asked questions

Code details

Code6661-3
SystemLOINC
Display nameMicroscopic observation Dry mount Nom (Tiss)
DescriptionObservation
Short nameDry Mount Tiss
ComponentObservation
PropertyPrid
TimingPt
System (specimen)Tiss
ScaleNom
MethodDry mount
ClassMICRO
StatusACTIVE
Order/ObservationBoth

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released1.0g
Last changed2.78

Consumer names

Microscopic observation, Tissue

Part names

ObservationPridPtTissNomDry mountPresence 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 6661-3 | HealthAssure