LOINCActive

LOINC Code 28997-5: Left cornea Steep refractive power by Keratometry

28997-5 is a LOINC code used to identify Left cornea Steep refractive power by Keratometry 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 Refractive power.steep. 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 Refractive power.steep. 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
  • Method: Keratometry

What it does not mean

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

Key facts

  • Left cornea Steep refractive power by Keratometry
  • Refractive power.steep
  • by KM; Corneal; EYE; EYE.REFRACTION; Inverse Length; L; L cornea; LT; Ophthalmology; Ophthalmometer; Ophtho; Ophthy; Point in time; Power R2; QNT; Quan; Quant; Quantitative; Random; Refract pwr

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 Steep refractive power by KeratometryL cornea Power R2 by KMRefractive power.steepEYE.REFRACTIONInvLenPtCornea.left

Frequently asked questions

Code details

Code28997-5
SystemLOINC
Display nameLeft cornea Steep refractive power by Keratometry
DescriptionRefractive power.steep
Short nameL cornea Power R2 by KM
ComponentRefractive power.steep
PropertyInvLen
TimingPt
System (specimen)Cornea.left
ScaleQn
MethodKeratometry
ClassEYE.REFRACTION
Example unitsDiopter
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

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

Part names

Refractive power.steepInvLenPtCornea.leftQnKeratometrySteep refractive powerInverse LengthPoint 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 28997-5 | HealthAssure