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.

LOINCActiveObservation

LOINC Code 86313-4: Right retina Retinal nerve fiber layer.clock hour 9 thickness by OCT

Name: LOINC Code 86313-4: Right retina Retinal nerve fiber layer.clock hour 9 thickness by OCT
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:14.637Z

86313-4 is a LOINC code used to identify Right retina Retinal nerve fiber layer.clock hour 9 thickness by OCT 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 Retinal nerve fiber layer.clock hour 9 thickness. It is commonly used with the system or sample type Retina.right.

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 Retinal nerve fiber layer.clock hour 9 thickness. It is commonly used with the system or sample type Retina.right.

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: OCT

What it does not mean

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

Key facts

Right retina Retinal nerve fiber layer.clock hour 9 thickness by OCT
Retinal nerve fiber layer.clock hour 9 thickness
EYE; EYE.OCT; Fibers; Length; Ophthalmology; Ophtho; Ophthy; Optical Coherence Tomography; Point in time; QNT; Quan; Quant; Quantitative; R; R ret; Random; Retinaldehyde; Retinene; Retinene 1; RNFL; RNFL 9 o'clock thickness; RT; Thick; Vit A aldehyde; Vit A1 aldehyde; Vitamin A aldehyde; Vitamin A1 aldehyde

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

Right retina Retinal nerve fiber layer.clock hour 9 thickness by OCTR ret RNFL 9 o'clock thickness OCTRetinal nerve fiber layer.clock hour 9 thicknessEYE.OCTLenPtRetina.right

Frequently asked questions

Code details

Code86313-4

SystemLOINC

Display nameRight retina Retinal nerve fiber layer.clock hour 9 thickness by OCT

DescriptionRetinal nerve fiber layer.clock hour 9 thickness

Short nameR ret RNFL 9 o'clock thickness OCT

ComponentRetinal nerve fiber layer.clock hour 9 thickness

PropertyLen

TimingPt

System (specimen)Retina.right

ScaleQn

MethodOCT

ClassEYE.OCT

Example unitsum

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.61

Last changed2.68

Part names

Retinal nerve fiber layer.clock hour 9 thicknessLenPtRetina.rightQnOCTLengthPoint in time (spot)Right retinaby OCT

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.