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.

LOINC

LOINC Code 64811-3: During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM [PhenX]

Name: LOINC Code 64811-3: During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:44.550Z

64811-3 is a LOINC code used to identify During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM [PhenX] 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 During the Mos of April through September, how many H each D of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM. 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 During the Mos of April through September, how many H each D of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM. 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: TRIAL
Method: PhenX

What it does not mean

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

Key facts

During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM [PhenX]
During the Mos of April through September, how many H each D of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM
Count/time; Dextro; Dir; Evening; Leisure sunlight exposure H; nRate; Number rate; Number Rate = Count/Time; Point in time; QNT; Quan; Quant; Quantitative; Random

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

During the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM [PhenX]Leisure sunlight exposure H nRate PhenXDuring the Mos of April through September, how many H each D of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PMPHENXNRatPt^Patient

Frequently asked questions

Code details

Code64811-3

SystemLOINC

Display nameDuring the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM [PhenX]

DescriptionDuring the Mos of April through September, how many H each D of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM

Short nameLeisure sunlight exposure H nRate PhenX

ComponentDuring the Mos of April through September, how many H each D of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PM

PropertyNRat

TimingPt

System (specimen)^Patient

ScaleQn

MethodPhenX

ClassPHENX

Example unitshours/days

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

During the Mos of April through September, how many H each D of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PMNRatPt^PatientQnPhenXDuring the months of April through September, how many hours each day of this leisure time did you spend outside in direct sunlight between 10 AM and 4 PMNumber RatePoint 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.