LOINCActive

LOINC Code 55999-7: Right contact lens Over refraction axis

55999-7 is a LOINC code used to identify Right contact lens Over refraction axis 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 Over refraction axis. It is commonly used with the system or sample type Contact lens.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 Over refraction axis. It is commonly used with the system or sample type Contact lens.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

What it does not mean

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

Key facts

  • Right contact lens Over refraction axis
  • Over refraction axis
  • Cont lens; EYE; EYE.CONTACT_LENS; Ophthalmology; Ophtho; Ophthy; OR axis; Point in time; QNT; Quan; Quant; Quantitative; R; R cont lens; Random; RT

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 contact lens Over refraction axisR cont lens OR axisOver refraction axisEYE.CONTACT_LENSAnglePtContact lens.right

Frequently asked questions

Code details

Code55999-7
SystemLOINC
Display nameRight contact lens Over refraction axis
DescriptionOver refraction axis
Short nameR cont lens OR axis
ComponentOver refraction axis
PropertyAngle
TimingPt
System (specimen)Contact lens.right
ScaleQn
ClassEYE.CONTACT_LENS
Example unitsdeg
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.29
Last changed2.70

Part names

Over refraction axisAnglePtContact lens.rightQnPoint in time (spot)Right 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 55999-7 | HealthAssure