LOINCActiveObservation

LOINC Code 79763-9: Left cornea Vertical diameter

79763-9 is a LOINC code used to identify Left cornea Vertical diameter 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 Vertical diameter. It is commonly used with the system or sample type Cornea.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 Vertical diameter. It is commonly used with the system or sample type Cornea.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

What it does not mean

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

Key facts

  • Left cornea Vertical diameter
  • Vertical diameter
  • 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).
  • Corneal; DIA; Diam; EYE; EYE.PX; EYE.PX.NEI; L; L cornea; Length; LT; Ophthalmology; Ophtho; Ophthy; Point in time; QNT; Quan; Quant; Quantitative; Random; Vert diam

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

Left cornea Vertical diameterL cornea Vert diamVertical diameterEYE.PX.NEILenPtCornea.left

Frequently asked questions

Code details

Code79763-9
SystemLOINC
Display nameLeft cornea Vertical diameter
DescriptionVertical diameter
Short nameL cornea Vert diam
ComponentVertical diameter
PropertyLen
TimingPt
System (specimen)Cornea.left
ScaleQn
ClassEYE.PX.NEI
Example unitsmm
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Vertical diameterLenPtCornea.leftQnLengthPoint in time (spot)Left cornea

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 79763-9 | HealthAssure