LOINCActive

LOINC Code 29133-6: Maddox Stabchen test for Heterophoria

29133-6 is a LOINC code used to identify Maddox Stabchen test for Heterophoria 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 Heterophoria. It is commonly used with the system or sample type Eyes.

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 Heterophoria. It is commonly used with the system or sample type Eyes.

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: Maddox Stabchen test

What it does not mean

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

Key facts

  • Maddox Stabchen test for Heterophoria
  • Heterophoria
  • Eye; EYE.HETEROPHORIA; Identity or presence; Nominal; Ophthalmologic; Ophthalmology; Ophtho; Ophthy; Point in time; 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

Maddox Stabchen test for HeterophoriaMaddox Stabchen testHeterophoriaEYE.HETEROPHORIAPridPtEyes

Frequently asked questions

Code details

Code29133-6
SystemLOINC
Display nameMaddox Stabchen test for Heterophoria
DescriptionHeterophoria
Short nameMaddox Stabchen test
ComponentHeterophoria
PropertyPrid
TimingPt
System (specimen)Eyes
ScaleNom
MethodMaddox Stabchen test
ClassEYE.HETEROPHORIA
StatusACTIVE

Flags

BillableNo
Valid clinical useNo

Source

SourceLOINC
Version2.82
Releasemain
First released2.00
Last changed2.61

Part names

HeterophoriaPridPtEyesNomMaddox Stabchen testPresence or IdentityPoint 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 29133-6 | HealthAssure