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 65582-9: Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference [PhenX]

Name: LOINC Code 65582-9: Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference [PhenX]
Creator: HealthAssure Clinical Team
Published: 2026-05-21T08:59:45.456Z

65582-9 is a LOINC code used to identify Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference [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 Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference. 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 Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference. 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

Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference [PhenX]
Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference
Arterial Stenosis; Finding; Findings; Morning evening preference; Ordinal; Point in time; QL; Qual; Qualitative; Random; Screen

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

Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference [PhenX]Morning evening preference PhenXDoes respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preferencePHENXFindPt^Patient

Frequently asked questions

Code details

Code65582-9

SystemLOINC

Display nameDoes respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference [PhenX]

DescriptionDoes respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference

Short nameMorning evening preference PhenX

ComponentDoes respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preference

PropertyFind

TimingPt

System (specimen)^Patient

ScaleOrd

MethodPhenX

ClassPHENX

StatusTRIAL

Flags

BillableNo

Valid clinical useNo

Source

SourceLOINC

Version2.82

Releasemain

First released2.36

Last changed2.65

Part names

Does respondent consistently fall asleep very late - 12 a.m. or later, at night and characterize him or herself as a night owl with a strong preferenceFindPt^PatientOrdPhenXFindingPoint 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.