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LOINC Code 28721-9: Eye Add 1 binocular by Phoropter

28721-9 is a LOINC code used to identify Eye Add 1 binocular 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 Add 1.binocular. It is commonly used with the system or sample type Eye.

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 Add 1.binocular. It is commonly used with the system or sample type Eye.

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
  • Method: Phoropter

What it does not mean

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

Key facts

  • Eye Add 1 binocular by Phoropter
  • Add 1.binocular
  • Add 1 Binoc; by Phoropter; Eye; EYE.REFRACTION; Eyeball; i; Inverse Length; Occular; Oculis; Ophthalmologic; Ophthalmology; Ophtho; Ophthy; Optic globe; Point in time; 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

Eye Add 1 binocular by PhoropterEye Add 1 Binoc by PhoropterAdd 1.binocularEYE.REFRACTIONInvLenPtEye

Frequently asked questions

Code details

Code28721-9
SystemLOINC
Display nameEye Add 1 binocular by Phoropter
DescriptionAdd 1.binocular
Short nameEye Add 1 Binoc by Phoropter
ComponentAdd 1.binocular
PropertyInvLen
TimingPt
System (specimen)Eye
ScaleQn
MethodPhoropter
ClassEYE.REFRACTION
Example unitsDiopter
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.71

Part names

Add 1.binocularInvLenPtEyeQnPhoropterAdd 1 binocularInverse LengthPoint in time (spot)

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 28721-9 | HealthAssure