LOINCActiveObservation

LOINC Code 95291-1: Type of Axis measurement increment

95291-1 is a LOINC code used to identify Type of Axis measurement increment 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 Axis measurement increment. It is commonly used with the system or sample type Refractometer.

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 Axis measurement increment. It is commonly used with the system or sample type Refractometer.

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

What it does not mean

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

Key facts

  • Type of Axis measurement increment
  • Axis measurement increment
  • Axis measurement increment is the specificity to which a refractometer can measure the axis, typically 1 or 5 degrees. For example, a 5 degree increment allows measurement of 5, 10, 15 degrees, etc., while a 1 degree increment allows finer measurement to a single degree.
  • Axis step; EYE; EYE.REFRACTION; Nominal; Ophthalmology; Ophtho; Ophthy; Point in time; Random; RM; Typ

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

Type of Axis measurement incrementType of Axis stepAxis measurement incrementEYE.REFRACTIONTypePtRefractometer

Frequently asked questions

Code details

Code95291-1
SystemLOINC
Display nameType of Axis measurement increment
DescriptionAxis measurement increment
Short nameType of Axis step
ComponentAxis measurement increment
PropertyType
TimingPt
System (specimen)Refractometer
ScaleNom
ClassEYE.REFRACTION
StatusACTIVE
Order/ObservationObservation

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.68
Last changed2.68

Part names

Axis measurement incrementTypePtRefractometerNomPoint 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 95291-1 | HealthAssure