What does this LOINC code represent?

This LOINC code identifies a lab observation, measurement, question, or clinical concept in a standardized format.

Is this enough to understand my test result?

No. The code identifies the test or observation, but the interpretation depends on the actual result, reference range, and clinical context.

LOINCActive

LOINC Code 28949-6: Left contact lens prescription Producer code

Name: LOINC Code 28949-6: Left contact lens prescription Producer code
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:15.024Z

28949-6 is a LOINC code used to identify Left contact lens prescription Producer code 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 Producer code. It is commonly used with the system or sample type Contact lens.prescription.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 Producer code. It is commonly used with the system or sample type Contact lens.prescription.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 prescription Producer code
Producer code
Cont lens; EYE; EYE.CONTACT_LENS; L; L cont lens Rx; LT; Nominal; Ophthalmology; Ophtho; Ophthy; Point in time; Random; Rx; 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

Left contact lens prescription Producer codeL cont lens Rx Producer codeProducer codeEYE.CONTACT_LENSTypePtContact lens.prescription.left

Frequently asked questions

Code details

Code28949-6

SystemLOINC

Display nameLeft contact lens prescription Producer code

DescriptionProducer code

Short nameL cont lens Rx Producer code

ComponentProducer code

PropertyType

TimingPt

System (specimen)Contact lens.prescription.left

ScaleNom

ClassEYE.CONTACT_LENS

StatusACTIVE

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.00

Last changed2.68

Part names

Producer codeTypePtContact lens.prescription.leftNomPoint in time (spot)Left contact lens prescription

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.