LOINCActiveObservation

LOINC Code 98375-9: Left eye Prism base direction far by Phoropter

98375-9 is a LOINC code used to identify Left eye Prism base direction far by Phoropter 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 Prism base direction far. It is commonly used with the system or sample type Eye.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 Prism base direction far. It is commonly used with the system or sample type Eye.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: Phoropter

What it does not mean

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

Key facts

  • Left eye Prism base direction far by Phoropter
  • Prism base direction far
  • by Phoropter; Eye; EYE.REFRACTION; Eyeball; L; L eye; LT; Occular; Oculis; Ophthalmologic; Ophthalmology; Ophtho; Ophthy; Optic globe; Point in time; Prism base dir far; QNT; Quan; Quant; Quantitative; Random; Vision; Visual

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 eye Prism base direction far by PhoropterL eye Prism base dir far by PhoropterPrism base direction farEYE.REFRACTIONAnglePtEye.left

Frequently asked questions

Code details

Code98375-9
SystemLOINC
Display nameLeft eye Prism base direction far by Phoropter
DescriptionPrism base direction far
Short nameL eye Prism base dir far by Phoropter
ComponentPrism base direction far
PropertyAngle
TimingPt
System (specimen)Eye.left
ScaleQn
MethodPhoropter
ClassEYE.REFRACTION
Example unitsdeg
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.71
Last changed2.71

Part names

Prism base direction farAnglePtEye.leftQnPhoropterPoint in time (spot)Left eye

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 98375-9 | HealthAssure