LOINCActiveObservation

LOINC Code 79864-5: Study observation Left iris Slit lamp biomicroscopy

79864-5 is a LOINC code used to identify Study observation Left iris Slit lamp biomicroscopy 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 Study observation. It is commonly used with the system or sample type Iris.left.

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 Study observation. It is commonly used with the system or sample type Iris.left.

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: Slit lamp biomicroscopy

What it does not mean

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

Key facts

  • Study observation Left iris Slit lamp biomicroscopy
  • Study observation
  • This term was developed in collaboration with the National Institute of Health's National Eye Institute (NEI) as part of an effort to standardize the data elements collected by the National Ophthalmic Disease Genotyping and Phenotyping Network (eyeGENE).
  • EYE; EYE.SLITLAMP; EYE.SLITLAMP.NEI; Finding; Findings; L; L iris; LT; Nominal; Ophthalmology; Ophtho; Ophthy; Point in time; Random; Study report

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

Study observation Left iris Slit lamp biomicroscopyStudy obs L iris Slit lampStudy observationEYE.SLITLAMP.NEIFindPtIris.left

Frequently asked questions

Code details

Code79864-5
SystemLOINC
Display nameStudy observation Left iris Slit lamp biomicroscopy
DescriptionStudy observation
Short nameStudy obs L iris Slit lamp
ComponentStudy observation
PropertyFind
TimingPt
System (specimen)Iris.left
ScaleNom
MethodSlit lamp biomicroscopy
ClassEYE.SLITLAMP.NEI
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.54
Last changed2.68

Part names

Study observationFindPtIris.leftNomSlit lamp biomicroscopyFindingPoint in time (spot)Left iris

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 79864-5 | HealthAssure