LOINCActive

LOINC Code 28901-7: Left contact lens Sphere

28901-7 is a LOINC code used to identify Left contact lens Sphere 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 Sphere. It is commonly used with the system or sample type Contact lens.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 Sphere. It is commonly used with the system or sample type Contact lens.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

What it does not mean

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

Key facts

  • Left contact lens Sphere
  • Sphere
  • Cont lens; EYE; EYE.CONTACT_LENS; Inverse Length; L; L cont lens; LT; Ophthalmology; Ophtho; Ophthy; Point in time; QNT; Quan; Quant; Quantitative; Random

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 contact lens SphereL cont lens SphereSphereEYE.CONTACT_LENSInvLenPtContact lens.left

Frequently asked questions

Code details

Code28901-7
SystemLOINC
Display nameLeft contact lens Sphere
DescriptionSphere
Short nameL cont lens Sphere
ComponentSphere
PropertyInvLen
TimingPt
System (specimen)Contact lens.left
ScaleQn
ClassEYE.CONTACT_LENS
Example unitsDiopter
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.70

Part names

SphereInvLenPtContact lens.leftQnInverse LengthPoint in time (spot)Left contact lens

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 28901-7 | HealthAssure