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.

LOINCActiveObservation

LOINC Code 99210-7: Level of difficulty seeing because of changes in vision clarity during the course of the day

Name: LOINC Code 99210-7: Level of difficulty seeing because of changes in vision clarity during the course of the day
Creator: HealthAssure Clinical Team
Published: 2026-05-21T09:00:33.064Z

99210-7 is a LOINC code used to identify Level of difficulty seeing because of changes in vision clarity during the course of the day 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 Level of difficulty seeing because of changes in vision clarity during the course of the day. It is commonly used with the system or sample type ^Patient.

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 Level of difficulty seeing because of changes in vision clarity during the course of the day. It is commonly used with the system or sample type ^Patient.

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

Level of difficulty seeing because of changes in vision clarity during the course of the day
Finding; Findings; Levels; Levl; LV; LVL; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen; Survey

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

Level of difficulty seeing because of changes in vision clarity during the course of the daySURVEY.PROWLFindPt^PatientOrdFinding

Frequently asked questions

Code details

Code99210-7

SystemLOINC

Display nameLevel of difficulty seeing because of changes in vision clarity during the course of the day

ComponentLevel of difficulty seeing because of changes in vision clarity during the course of the day

PropertyFind

TimingPt

System (specimen)^Patient

ScaleOrd

ClassSURVEY.PROWL

StatusACTIVE

Order/ObservationObservation

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.72

Last changed2.72

Part names

Level of difficulty seeing because of changes in vision clarity during the course of the dayFindPt^PatientOrdFindingPoint 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.